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content / child / runtime_features.cc [blame]
// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/child/runtime_features.h"
#include <string>
#include <vector>
#include "base/base_switches.h"
#include "base/command_line.h"
#include "base/feature_list.h"
#include "base/memory/raw_ref.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/field_trial_params.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "cc/base/features.h"
#include "components/attribution_reporting/features.h"
#include "content/common/content_navigation_policy.h"
#include "content/common/content_switches_internal.h"
#include "content/common/features.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "device/base/features.h"
#include "device/fido/features.h"
#include "device/gamepad/public/cpp/gamepad_features.h"
#include "device/vr/buildflags/buildflags.h"
#include "gpu/config/gpu_finch_features.h"
#include "gpu/config/gpu_switches.h"
#include "media/base/media_switches.h"
#include "services/device/public/cpp/device_features.h"
#include "services/network/public/cpp/features.h"
#include "services/webnn/public/mojom/features.mojom-features.h"
#include "third_party/blink/public/common/buildflags.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/public/common/features_generated.h"
#include "third_party/blink/public/common/loader/referrer_utils.h"
#include "third_party/blink/public/common/switches.h"
#include "third_party/blink/public/platform/web_runtime_features.h"
#include "ui/accessibility/accessibility_features.h"
#include "ui/base/ui_base_features.h"
#include "ui/events/blink/blink_features.h"
#include "ui/gfx/switches.h"
#include "ui/gl/gl_switches.h"
#include "ui/native_theme/native_theme_features.h"
#include "ui/native_theme/native_theme_utils.h"
#if BUILDFLAG(IS_ANDROID)
#include "base/android/build_info.h"
#endif
#if BUILDFLAG(ENABLE_VR)
#include "device/vr/public/cpp/features.h"
#endif
using blink::WebRuntimeFeatures;
namespace {
// Sets blink runtime features for specific platforms.
// This should be a last resort vs runtime_enabled_features.json5.
void SetRuntimeFeatureDefaultsForPlatform(
const base::CommandLine& command_line) {
// Please consider setting up feature defaults for different platforms
// in runtime_enabled_features.json5 instead of here
// TODO(rodneyding): Move the more common cases here
// to baseFeature/switch functions below and move more complex
// ones to special case functions.
#if defined(USE_AURA)
WebRuntimeFeatures::EnableCompositedSelectionUpdate(true);
#endif
#if BUILDFLAG(IS_APPLE) || BUILDFLAG(IS_CHROMEOS_LACROS)
const bool enable_canvas_2d_image_chromium =
command_line.HasSwitch(
blink::switches::kEnableGpuMemoryBufferCompositorResources) &&
!command_line.HasSwitch(switches::kDisable2dCanvasImageChromium) &&
!command_line.HasSwitch(switches::kDisableGpu) &&
base::FeatureList::IsEnabled(features::kCanvas2DImageChromium);
#else
constexpr bool enable_canvas_2d_image_chromium = false;
#endif
WebRuntimeFeatures::EnableCanvas2dImageChromium(
enable_canvas_2d_image_chromium);
#if BUILDFLAG(IS_APPLE)
const bool enable_web_gl_image_chromium =
command_line.HasSwitch(
blink::switches::kEnableGpuMemoryBufferCompositorResources) &&
!command_line.HasSwitch(switches::kDisableWebGLImageChromium) &&
!command_line.HasSwitch(switches::kDisableGpu);
#else
const bool enable_web_gl_image_chromium =
command_line.HasSwitch(switches::kEnableWebGLImageChromium);
#endif
WebRuntimeFeatures::EnableWebGLImageChromium(enable_web_gl_image_chromium);
#if BUILDFLAG(IS_ANDROID)
if (command_line.HasSwitch(switches::kDisableMediaSessionAPI)) {
WebRuntimeFeatures::EnableMediaSession(false);
}
#endif
#if BUILDFLAG(IS_ANDROID)
if (base::android::BuildInfo::GetInstance()->sdk_int() >=
base::android::SDK_VERSION_P) {
// Display Cutout is limited to Android P+.
WebRuntimeFeatures::EnableDisplayCutoutAPI(true);
}
#endif
#if BUILDFLAG(IS_ANDROID)
WebRuntimeFeatures::EnableMediaControlsExpandGesture(
base::FeatureList::IsEnabled(media::kMediaControlsExpandGesture));
#endif
}
enum RuntimeFeatureEnableOptions {
// - If the base::Feature default is overridden by field trial or command
// line, set Blink feature to the state of the base::Feature;
// - Otherwise if the base::Feature is enabled, enable the Blink feature.
// - Otherwise no change.
kDefault,
// Enables the Blink feature when the base::Feature is overridden by field
// trial or command line. Otherwise no change. Its difference from kDefault is
// that the Blink feature isn't affected by the default state of the
// base::Feature. This is useful for Blink origin trial features especially
// those implemented in both Chromium and Blink. As origin trial only controls
// the Blink features, for now we require the base::Feature to be enabled by
// default, but we don't want the default enabled status affect the Blink
// feature. See also https://crbug.com/1048656#c10.
// This can also be used for features that are enabled by default in Chromium
// but not in Blink on all platforms and we want to use the Blink status.
// However, we would prefer consistent Chromium and Blink status to this.
kSetOnlyIfOverridden,
};
template <typename T>
// Helper class that describes the desired actions for the runtime feature
// depending on a check for chromium base::Feature.
struct RuntimeFeatureToChromiumFeatureMap {
// This can be either an enabler function defined in web_runtime_features.cc
// or the string name of the feature in runtime_enabled_features.json5.
T feature_enabler;
// The chromium base::Feature to check.
const raw_ref<const base::Feature> chromium_feature;
const RuntimeFeatureEnableOptions option = kDefault;
};
template <typename Enabler>
void SetRuntimeFeatureFromChromiumFeature(const base::Feature& chromium_feature,
RuntimeFeatureEnableOptions option,
const Enabler& enabler) {
using FeatureList = base::FeatureList;
const bool feature_enabled = FeatureList::IsEnabled(chromium_feature);
const bool is_overridden =
FeatureList::GetStateIfOverridden(chromium_feature).has_value();
switch (option) {
case kSetOnlyIfOverridden:
if (is_overridden) {
enabler(feature_enabled);
}
break;
case kDefault:
if (feature_enabled || is_overridden) {
enabler(feature_enabled);
}
break;
default:
NOTREACHED_IN_MIGRATION();
}
}
// Sets blink runtime features that are either directly
// controlled by Chromium base::Feature or are overridden
// by base::Feature states.
void SetRuntimeFeaturesFromChromiumFeatures() {
using wf = WebRuntimeFeatures;
// To add a runtime feature control, add a new
// RuntimeFeatureToChromiumFeatureMap entry here if there is a custom
// enabler function defined. Otherwise add the entry with string name
// in the next list.
const RuntimeFeatureToChromiumFeatureMap<void (*)(bool)>
blinkFeatureToBaseFeatureMapping[] = {
{wf::EnableAccessibilityAriaVirtualContent,
raw_ref(features::kEnableAccessibilityAriaVirtualContent)},
#if BUILDFLAG(IS_ANDROID)
{wf::EnableAccessibilityPageZoom,
raw_ref(features::kAccessibilityPageZoom)},
#endif
{wf::EnableAccessibilityUseAXPositionForDocumentMarkers,
raw_ref(features::kUseAXPositionForDocumentMarkers)},
{wf::EnableAOMAriaRelationshipProperties,
raw_ref(features::kEnableAriaElementReflection)},
{wf::EnableBackgroundFetch, raw_ref(features::kBackgroundFetch)},
{wf::EnableBoundaryEventDispatchTracksNodeRemoval,
raw_ref(blink::features::kBoundaryEventDispatchTracksNodeRemoval)},
{wf::EnableBrowserVerifiedUserActivationKeyboard,
raw_ref(features::kBrowserVerifiedUserActivationKeyboard)},
{wf::EnableBrowserVerifiedUserActivationMouse,
raw_ref(features::kBrowserVerifiedUserActivationMouse)},
{wf::EnableCompositeBGColorAnimation,
raw_ref(features::kCompositeBGColorAnimation)},
{wf::EnableCooperativeScheduling,
raw_ref(features::kCooperativeScheduling)},
{wf::EnableDigitalGoods, raw_ref(features::kDigitalGoodsApi),
kSetOnlyIfOverridden},
{wf::EnableDocumentPolicyNegotiation,
raw_ref(features::kDocumentPolicyNegotiation)},
{wf::EnableEyeDropperAPI, raw_ref(features::kEyeDropper),
kSetOnlyIfOverridden},
{wf::EnableFedCm, raw_ref(features::kFedCm), kSetOnlyIfOverridden},
{wf::EnableFedCmButtonMode, raw_ref(features::kFedCmButtonMode),
kSetOnlyIfOverridden},
{wf::EnableFedCmAuthz, raw_ref(features::kFedCmAuthz), kDefault},
{wf::EnableFedCmIdPRegistration,
raw_ref(features::kFedCmIdPRegistration), kDefault},
{wf::EnableFedCmIdpSigninStatus,
raw_ref(features::kFedCmIdpSigninStatusEnabled),
kSetOnlyIfOverridden},
{wf::EnableGamepadMultitouch,
raw_ref(features::kEnableGamepadMultitouch)},
{wf::EnableSharedStorageAPI,
raw_ref(features::kPrivacySandboxAdsAPIsOverride),
kSetOnlyIfOverridden},
{wf::EnableSharedStorageAPI,
raw_ref(features::kPrivacySandboxAdsAPIsM1Override)},
{wf::EnableSharedStorageAPIM118,
raw_ref(blink::features::kSharedStorageAPIM118), kDefault},
{wf::EnableSharedStorageAPIM125,
raw_ref(blink::features::kSharedStorageAPIM125), kDefault},
{wf::EnableFedCmMultipleIdentityProviders,
raw_ref(features::kFedCmMultipleIdentityProviders),
kSetOnlyIfOverridden},
{wf::EnableFedCmSelectiveDisclosure,
raw_ref(features::kFedCmSelectiveDisclosure), kDefault},
{wf::EnableFencedFrames,
raw_ref(features::kPrivacySandboxAdsAPIsOverride),
kSetOnlyIfOverridden},
{wf::EnableFencedFrames,
raw_ref(features::kPrivacySandboxAdsAPIsM1Override)},
{wf::EnableForcedColors, raw_ref(features::kForcedColors)},
{wf::EnableFractionalScrollOffsets,
raw_ref(features::kFractionalScrollOffsets)},
{wf::EnableSensorExtraClasses,
raw_ref(features::kGenericSensorExtraClasses)},
#if BUILDFLAG(IS_ANDROID)
{wf::EnableGetDisplayMedia,
raw_ref(features::kUserMediaScreenCapturing)},
#endif
{wf::EnableInstalledApp, raw_ref(features::kInstalledApp)},
{wf::EnableLazyInitializeMediaControls,
raw_ref(features::kLazyInitializeMediaControls)},
#if BUILDFLAG(IS_CHROMEOS)
{wf::EnableLockedMode, raw_ref(blink::features::kLockedMode)},
#endif
{wf::EnableMediaCastOverlayButton,
raw_ref(media::kMediaCastOverlayButton)},
{wf::EnableMediaEngagementBypassAutoplayPolicies,
raw_ref(media::kMediaEngagementBypassAutoplayPolicies)},
{wf::EnableNotificationContentImage,
raw_ref(features::kNotificationContentImage), kSetOnlyIfOverridden},
{wf::EnablePaymentApp, raw_ref(features::kServiceWorkerPaymentApps)},
{wf::EnablePaymentRequest, raw_ref(features::kWebPayments)},
{wf::EnablePercentBasedScrolling,
raw_ref(features::kWindowsScrollingPersonality)},
{wf::EnablePeriodicBackgroundSync,
raw_ref(features::kPeriodicBackgroundSync)},
{wf::EnablePushMessagingSubscriptionChange,
raw_ref(features::kPushSubscriptionChangeEvent)},
{wf::EnableRestrictGamepadAccess,
raw_ref(features::kRestrictGamepadAccess)},
{wf::EnableSecurePaymentConfirmation,
raw_ref(features::kSecurePaymentConfirmation)},
{wf::EnableSecurePaymentConfirmationDebug,
raw_ref(features::kSecurePaymentConfirmationDebug)},
{wf::EnableSendBeaconThrowForBlobWithNonSimpleType,
raw_ref(features::kSendBeaconThrowForBlobWithNonSimpleType)},
{wf::EnableSharedArrayBuffer, raw_ref(features::kSharedArrayBuffer)},
{wf::EnableSharedArrayBufferOnDesktop,
raw_ref(features::kSharedArrayBufferOnDesktop)},
#if BUILDFLAG(IS_ANDROID)
{wf::EnableSmartZoom, raw_ref(features::kSmartZoom)},
#endif
{wf::EnableTouchDragAndContextMenu,
raw_ref(features::kTouchDragAndContextMenu)},
{wf::EnableUserActivationSameOriginVisibility,
raw_ref(features::kUserActivationSameOriginVisibility)},
{wf::EnableWebAuthenticationAmbient,
raw_ref(device::kWebAuthnAmbientSignin)},
{wf::EnableWebBluetooth, raw_ref(features::kWebBluetooth),
kSetOnlyIfOverridden},
{wf::EnableWebBluetoothGetDevices,
raw_ref(features::kWebBluetoothNewPermissionsBackend),
kSetOnlyIfOverridden},
{wf::EnableWebBluetoothWatchAdvertisements,
raw_ref(features::kWebBluetoothNewPermissionsBackend),
kSetOnlyIfOverridden},
#if BUILDFLAG(IS_ANDROID)
{wf::EnableWebNFC, raw_ref(features::kWebNfc), kSetOnlyIfOverridden},
#endif
{wf::EnableWebIdentityDigitalCredentials,
raw_ref(features::kWebIdentityDigitalCredentials),
kSetOnlyIfOverridden},
{wf::EnableWebOTP, raw_ref(features::kWebOTP), kSetOnlyIfOverridden},
{wf::EnableWebOTPAssertionFeaturePolicy,
raw_ref(features::kWebOTPAssertionFeaturePolicy),
kSetOnlyIfOverridden},
{wf::EnableWebUSB, raw_ref(features::kWebUsb)},
{wf::EnableWebXR, raw_ref(features::kWebXr)},
#if BUILDFLAG(ENABLE_VR)
{wf::EnableWebXRFrontFacing,
raw_ref(device::features::kWebXrIncubations)},
{wf::EnableWebXRFrameRate,
raw_ref(device::features::kWebXrIncubations)},
{wf::EnableWebXRGPUBinding,
raw_ref(device::features::kWebXrIncubations)},
{wf::EnableWebXRHandInput,
raw_ref(device::features::kWebXrHandInput)},
{wf::EnableWebXRImageTracking,
raw_ref(device::features::kWebXrIncubations)},
{wf::EnableWebXRLayers, raw_ref(device::features::kWebXrLayers)},
{wf::EnableWebXRPlaneDetection,
raw_ref(device::features::kWebXrIncubations)},
{wf::EnableWebXRPoseMotionData,
raw_ref(device::features::kWebXrIncubations)},
{wf::EnableWebXRSpecParity,
raw_ref(device::features::kWebXrIncubations)},
#endif
{wf::EnableServiceWorkerStaticRouter,
raw_ref(features::kServiceWorkerStaticRouter)},
{wf::EnablePermissions, raw_ref(features::kWebPermissionsApi),
kSetOnlyIfOverridden},
};
for (const auto& mapping : blinkFeatureToBaseFeatureMapping) {
SetRuntimeFeatureFromChromiumFeature(
*mapping.chromium_feature, mapping.option, mapping.feature_enabler);
}
// TODO(crbug.com/40571563): Cleanup the inconsistency between custom WRF
// enabler function and using feature string name with
// EnableFeatureFromString.
const RuntimeFeatureToChromiumFeatureMap<const char*>
runtimeFeatureNameToChromiumFeatureMapping[] = {
{"AllowContentInitiatedDataUrlNavigations",
raw_ref(features::kAllowContentInitiatedDataUrlNavigations)},
{"AllowURNsInIframes", raw_ref(blink::features::kAllowURNsInIframes)},
{"AllowURNsInIframes",
raw_ref(features::kPrivacySandboxAdsAPIsOverride),
kSetOnlyIfOverridden},
{"AllowURNsInIframes",
raw_ref(features::kPrivacySandboxAdsAPIsM1Override)},
{"AttributionReporting",
raw_ref(features::kPrivacySandboxAdsAPIsOverride),
kSetOnlyIfOverridden},
{"AttributionReporting",
raw_ref(features::kPrivacySandboxAdsAPIsM1Override)},
{"AttributionReportingCrossAppWeb",
raw_ref(features::kPrivacySandboxAdsAPIsOverride),
kSetOnlyIfOverridden},
{"AndroidDownloadableFontsMatching",
raw_ref(features::kAndroidDownloadableFontsMatching)},
#if BUILDFLAG(IS_ANDROID)
{"CCTNewRFMPushBehavior",
raw_ref(blink::features::kCCTNewRFMPushBehavior)},
#endif
{"CompressionDictionaryTransport",
raw_ref(network::features::kCompressionDictionaryTransport)},
{"CompressionDictionaryTransportBackend",
raw_ref(network::features::kCompressionDictionaryTransportBackend)},
{"CookieDeprecationFacilitatedTesting",
raw_ref(features::kCookieDeprecationFacilitatedTesting)},
{"Database", raw_ref(blink::features::kWebSQLAccess),
kSetOnlyIfOverridden},
{"DocumentPolicyIncludeJSCallStacksInCrashReports",
raw_ref(blink::features::
kDocumentPolicyIncludeJSCallStacksInCrashReports),
kSetOnlyIfOverridden},
{"FencedFramesLocalUnpartitionedDataAccess",
raw_ref(blink::features::kFencedFramesLocalUnpartitionedDataAccess)},
{"Fledge", raw_ref(blink::features::kFledge)},
{"Fledge", raw_ref(features::kPrivacySandboxAdsAPIsOverride),
kSetOnlyIfOverridden},
{"Fledge", raw_ref(features::kPrivacySandboxAdsAPIsM1Override),
kSetOnlyIfOverridden},
{"FledgeBiddingAndAuctionServerAPI",
raw_ref(blink::features::kFledgeBiddingAndAuctionServer), kDefault},
{"FontationsFontBackend",
raw_ref(blink::features::kFontationsFontBackend)},
{"FontSrcLocalMatching", raw_ref(features::kFontSrcLocalMatching)},
{"LegacyWindowsDWriteFontFallback",
raw_ref(features::kLegacyWindowsDWriteFontFallback)},
{"MachineLearningNeuralNetwork",
raw_ref(webnn::mojom::features::kWebMachineLearningNeuralNetwork),
kSetOnlyIfOverridden},
{"OriginIsolationHeader", raw_ref(features::kOriginIsolationHeader)},
{"ReduceAcceptLanguage",
raw_ref(network::features::kReduceAcceptLanguage)},
{"SerialPortConnected", raw_ref(features::kSerialPortConnected)},
{"TopicsAPI", raw_ref(features::kPrivacySandboxAdsAPIsOverride),
kSetOnlyIfOverridden},
{"TopicsAPI", raw_ref(features::kPrivacySandboxAdsAPIsM1Override)},
{"TopicsDocumentAPI",
raw_ref(features::kPrivacySandboxAdsAPIsOverride),
kSetOnlyIfOverridden},
{"TopicsDocumentAPI",
raw_ref(features::kPrivacySandboxAdsAPIsM1Override)},
{"TouchTextEditingRedesign",
raw_ref(features::kTouchTextEditingRedesign)},
{"TrustedTypesFromLiteral",
raw_ref(features::kTrustedTypesFromLiteral)},
{"WebSerialBluetooth",
raw_ref(features::kEnableBluetoothSerialPortProfileInSerialApi)},
{"MediaStreamTrackTransfer",
raw_ref(features::kMediaStreamTrackTransfer)},
{"PrivateNetworkAccessPermissionPrompt",
raw_ref(network::features::kPrivateNetworkAccessPermissionPrompt),
kSetOnlyIfOverridden},
{"ExperimentalMachineLearningNeuralNetwork",
raw_ref(webnn::mojom::features::
kExperimentalWebMachineLearningNeuralNetwork),
kSetOnlyIfOverridden}};
for (const auto& mapping : runtimeFeatureNameToChromiumFeatureMapping) {
SetRuntimeFeatureFromChromiumFeature(
*mapping.chromium_feature, mapping.option, [&mapping](bool enabled) {
wf::EnableFeatureFromString(mapping.feature_enabler, enabled);
});
}
WebRuntimeFeatures::UpdateStatusFromBaseFeatures();
}
// Helper class that describes the desired enable/disable action
// for a runtime feature when a command line switch exists.
struct SwitchToFeatureMap {
// The enabler function defined in web_runtime_features.cc.
void (*feature_enabler)(bool);
// The switch to check for on command line.
const char* switch_name;
// This is the desired state for the runtime feature if the
// switch exists on command line.
bool target_enabled_state;
};
// Sets blink runtime features controlled by command line switches.
void SetRuntimeFeaturesFromCommandLine(const base::CommandLine& command_line) {
// To add a new switch-controlled runtime feature, add a new
// SwitchToFeatureMap entry to the initializer list below.
// Note: command line switches are now discouraged, please consider
// using base::Feature instead.
// https://chromium.googlesource.com/chromium/src/+/refs/heads/main/docs/configuration.md#switches
using wrf = WebRuntimeFeatures;
const SwitchToFeatureMap switchToFeatureMapping[] = {
// Stable Features
{wrf::EnablePresentation, switches::kDisablePresentationAPI, false},
{wrf::EnableRemotePlayback, switches::kDisableRemotePlaybackAPI, false},
{wrf::EnableTimerThrottlingForBackgroundTabs,
switches::kDisableBackgroundTimerThrottling, false},
// End of Stable Features
{wrf::EnableAutomationControlled, switches::kEnableAutomation, true},
{wrf::EnableAutomationControlled, switches::kHeadless, true},
{wrf::EnableAutomationControlled, switches::kRemoteDebuggingPipe, true},
{wrf::EnableDatabase, switches::kDisableDatabases, false},
{wrf::EnableFileSystem, switches::kDisableFileSystem, false},
{wrf::EnableNetInfoDownlinkMax,
switches::kEnableNetworkInformationDownlinkMax, true},
{wrf::EnableNotifications, switches::kDisableNotifications, false},
{wrf::EnablePreciseMemoryInfo, switches::kEnablePreciseMemoryInfo, true},
// Chrome's Push Messaging implementation relies on Web Notifications.
{wrf::EnablePushMessaging, switches::kDisableNotifications, false},
{wrf::EnableScriptedSpeechRecognition, switches::kDisableSpeechAPI,
false},
{wrf::EnableScriptedSpeechSynthesis, switches::kDisableSpeechAPI, false},
{wrf::EnableScriptedSpeechSynthesis, switches::kDisableSpeechSynthesisAPI,
false},
{wrf::EnableSharedWorker, switches::kDisableSharedWorkers, false},
{wrf::EnableMutationEvents, blink::switches::kMutationEventsEnabled,
true},
{wrf::EnableKeyboardFocusableScrollers,
blink::switches::kKeyboardFocusableScrollersEnabled, true},
{wrf::EnableKeyboardFocusableScrollers,
blink::switches::kKeyboardFocusableScrollersOptOut, false},
{wrf::EnableStandardizedBrowserZoom,
blink::switches::kDisableStandardizedBrowserZoom, false},
{wrf::EnableCSSCustomStateDeprecatedSyntax,
blink::switches::kCSSCustomStateDeprecatedSyntaxEnabled, true},
{wrf::EnableSelectParserRelaxation,
blink::switches::kDisableSelectParserRelaxation, false},
{wrf::EnableTextFragmentIdentifiers,
switches::kDisableScrollToTextFragment, false},
{wrf::EnableWebAuthenticationRemoteDesktopSupport,
switches::kWebAuthRemoteDesktopSupport, true},
{wrf::EnableWebGLDeveloperExtensions,
switches::kEnableWebGLDeveloperExtensions, true},
{wrf::EnableWebGLDraftExtensions, switches::kEnableWebGLDraftExtensions,
true},
{wrf::EnableWebGPUDeveloperFeatures,
switches::kEnableWebGPUDeveloperFeatures, true},
{wrf::EnableWebGPUExperimentalFeatures, switches::kEnableUnsafeWebGPU,
true},
};
for (const auto& mapping : switchToFeatureMapping) {
if (command_line.HasSwitch(mapping.switch_name)) {
mapping.feature_enabler(mapping.target_enabled_state);
}
}
// Set EnableAutomationControlled if the caller passes
// --remote-debugging-port=0 on the command line. This means
// the caller has requested an ephemeral port which is how ChromeDriver
// launches the browser by default.
// If the caller provides a specific port number, this is
// more likely for attaching a debugger, so we should leave
// EnableAutomationControlled unset to ensure the browser behaves as it does
// when not under automation control.
if (command_line.HasSwitch(switches::kRemoteDebuggingPort)) {
std::string port_str =
command_line.GetSwitchValueASCII(::switches::kRemoteDebuggingPort);
int port;
if (base::StringToInt(port_str, &port) && port == 0) {
WebRuntimeFeatures::EnableAutomationControlled(true);
}
}
}
// Sets blink runtime features that depend on a combination
// of args rather than a single check of base::Feature or switch.
// This can be a combination of both or custom checking logic
// not covered by other functions. In short, this should be used
// as a last resort.
void SetCustomizedRuntimeFeaturesFromCombinedArgs(
const base::CommandLine& command_line) {
// CAUTION: Only add custom enabling logic here if it cannot
// be covered by the other functions.
// These checks are custom wrappers around base::FeatureList::IsEnabled
// They're moved here to distinguish them from actual base checks
WebRuntimeFeatures::EnableOverlayScrollbars(ui::IsOverlayScrollbarEnabled());
WebRuntimeFeatures::EnableFluentScrollbars(ui::IsFluentScrollbarEnabled());
WebRuntimeFeatures::EnableFluentOverlayScrollbars(
ui::IsFluentOverlayScrollbarEnabled());
// TODO(rodneyding): This is a rare case for a stable feature
// Need to investigate more to determine whether to refactor it.
if (command_line.HasSwitch(switches::kDisableV8IdleTasks)) {
WebRuntimeFeatures::EnableV8IdleTasks(false);
} else {
WebRuntimeFeatures::EnableV8IdleTasks(true);
}
WebRuntimeFeatures::EnableBackForwardCache(
content::IsBackForwardCacheEnabled());
if (base::FeatureList::IsEnabled(network::features::kPrivateStateTokens)) {
WebRuntimeFeatures::EnablePrivateStateTokens(true);
WebRuntimeFeatures::EnablePrivateStateTokensAlwaysAllowIssuance(true);
} else if (base::FeatureList::IsEnabled(network::features::kFledgePst)) {
// See https://bit.ly/configuring-trust-tokens.
using network::features::TrustTokenOriginTrialSpec;
switch (
network::features::kTrustTokenOperationsRequiringOriginTrial.Get()) {
case TrustTokenOriginTrialSpec::kOriginTrialNotRequired:
// Setting PrivateStateTokens=true enables the Trust Tokens interface;
// PrivateStateTokensAlwaysAllowIssuance disables a runtime check
// during issuance that the origin trial is active (see
// blink/.../trust_token_issuance_authorization.h).
WebRuntimeFeatures::EnablePrivateStateTokens(true);
WebRuntimeFeatures::EnablePrivateStateTokensAlwaysAllowIssuance(true);
break;
case TrustTokenOriginTrialSpec::kAllOperationsRequireOriginTrial:
// The origin trial itself will be responsible for enabling the
// PrivateStateTokens RuntimeEnabledFeature.
WebRuntimeFeatures::EnablePrivateStateTokens(false);
WebRuntimeFeatures::EnablePrivateStateTokensAlwaysAllowIssuance(false);
break;
case TrustTokenOriginTrialSpec::kOnlyIssuanceRequiresOriginTrial:
// At issuance, a runtime check will be responsible for checking that
// the origin trial is present.
WebRuntimeFeatures::EnablePrivateStateTokens(true);
WebRuntimeFeatures::EnablePrivateStateTokensAlwaysAllowIssuance(false);
break;
}
}
}
// Ensures that the various ways of enabling/disabling features do not produce
// an invalid configuration.
void ResolveInvalidConfigurations() {
// Fenced frames cannot be enabled without the support of the
// browser process.
if ((base::FeatureList::IsEnabled(features::kPrivacySandboxAdsAPIsOverride) ||
base::FeatureList::IsEnabled(
features::kPrivacySandboxAdsAPIsM1Override)) &&
!base::FeatureList::IsEnabled(blink::features::kFencedFrames)) {
LOG_IF(WARNING, WebRuntimeFeatures::IsFencedFramesEnabled())
<< "Fenced frames cannot be enabled in this configuration. Use --"
<< switches::kEnableFeatures << "="
<< blink::features::kFencedFrames.name << " instead.";
WebRuntimeFeatures::EnableFencedFrames(false);
}
if (!base::FeatureList::IsEnabled(blink::features::kFencedFrames) &&
base::FeatureList::IsEnabled(
blink::features::kFencedFramesLocalUnpartitionedDataAccess)) {
LOG_IF(
WARNING,
WebRuntimeFeatures::IsFencedFramesLocalUnpartitionedDataAccessEnabled())
<< "Fenced frames must be enabled in order to enable local "
"unpartitioned "
<< "data access. Use --" << switches::kEnableFeatures << "="
<< blink::features::kFencedFrames.name << " in addition.";
WebRuntimeFeatures::EnableFeatureFromString(
"FencedFramesLocalUnpartitionedDataAccess", false);
}
// Topics API cannot be enabled without the support of the browser process.
// The Document API should be additionally gated by the
// `kBrowsingTopicsDocumentAPI` feature.
if (!base::FeatureList::IsEnabled(blink::features::kBrowsingTopics)) {
LOG_IF(WARNING, WebRuntimeFeatures::IsTopicsAPIEnabled())
<< "Topics cannot be enabled in this configuration. Use --"
<< switches::kEnableFeatures << "="
<< blink::features::kBrowsingTopics.name << " in addition.";
WebRuntimeFeatures::EnableTopicsAPI(false);
WebRuntimeFeatures::EnableTopicsDocumentAPI(false);
} else {
if (!base::FeatureList::IsEnabled(
blink::features::kBrowsingTopicsDocumentAPI)) {
LOG_IF(WARNING, WebRuntimeFeatures::IsTopicsDocumentAPIEnabled())
<< "Topics Document API cannot be enabled in this configuration. Use "
"--"
<< switches::kEnableFeatures << "="
<< blink::features::kBrowsingTopicsDocumentAPI.name
<< " in addition.";
WebRuntimeFeatures::EnableTopicsDocumentAPI(false);
}
}
if (!base::FeatureList::IsEnabled(blink::features::kSharedStorageAPI)) {
LOG_IF(WARNING, WebRuntimeFeatures::IsSharedStorageAPIEnabled())
<< "SharedStorage cannot be enabled in this "
"configuration. Use --"
<< switches::kEnableFeatures << "="
<< blink::features::kSharedStorageAPI.name << " in addition.";
WebRuntimeFeatures::EnableSharedStorageAPI(false);
}
if (!base::FeatureList::IsEnabled(blink::features::kSharedStorageAPIM118) ||
!base::FeatureList::IsEnabled(blink::features::kSharedStorageAPI)) {
LOG_IF(WARNING, WebRuntimeFeatures::IsSharedStorageAPIM118Enabled())
<< "SharedStorage for M118+ cannot be enabled in this "
"configuration. Use --"
<< switches::kEnableFeatures << "="
<< blink::features::kSharedStorageAPI.name << ","
<< blink::features::kSharedStorageAPIM118.name << " in addition.";
WebRuntimeFeatures::EnableSharedStorageAPIM118(false);
}
if (!base::FeatureList::IsEnabled(blink::features::kSharedStorageAPIM125) ||
!base::FeatureList::IsEnabled(blink::features::kSharedStorageAPI)) {
LOG_IF(WARNING, WebRuntimeFeatures::IsSharedStorageAPIM125Enabled())
<< "SharedStorage for M125+ cannot be enabled in this "
"configuration. Use --"
<< switches::kEnableFeatures << "="
<< blink::features::kSharedStorageAPI.name << ","
<< blink::features::kSharedStorageAPIM125.name << " in addition.";
WebRuntimeFeatures::EnableSharedStorageAPIM125(false);
}
if (!base::FeatureList::IsEnabled(
attribution_reporting::features::kConversionMeasurement)) {
LOG_IF(WARNING, WebRuntimeFeatures::IsAttributionReportingEnabled())
<< "AttributionReporting cannot be enabled in this "
"configuration. Use --"
<< switches::kEnableFeatures << "="
<< attribution_reporting::features::kConversionMeasurement.name
<< " in addition.";
WebRuntimeFeatures::EnableAttributionReporting(false);
}
if (!base::FeatureList::IsEnabled(
attribution_reporting::features::kConversionMeasurement) ||
!base::FeatureList::IsEnabled(
network::features::kAttributionReportingCrossAppWeb)) {
LOG_IF(WARNING,
WebRuntimeFeatures::IsAttributionReportingCrossAppWebEnabled())
<< "AttributionReportingCrossAppWeb cannot be enabled in this "
"configuration. Use --"
<< switches::kEnableFeatures << "="
<< attribution_reporting::features::kConversionMeasurement.name << ","
<< network::features::kAttributionReportingCrossAppWeb.name
<< " in addition.";
WebRuntimeFeatures::EnableAttributionReportingCrossAppWeb(false);
}
if (!base::FeatureList::IsEnabled(blink::features::kInterestGroupStorage)) {
LOG_IF(WARNING, WebRuntimeFeatures::IsAdInterestGroupAPIEnabled())
<< "AdInterestGroupAPI cannot be enabled in this "
"configuration. Use --"
<< switches::kEnableFeatures << "="
<< blink::features::kInterestGroupStorage.name << " in addition.";
WebRuntimeFeatures::EnableAdInterestGroupAPI(false);
WebRuntimeFeatures::EnableFledge(false);
}
if (base::FeatureList::IsEnabled(
features::kCookieDeprecationFacilitatedTesting)) {
WebRuntimeFeatures::EnableFledgeMultiBid(false);
WebRuntimeFeatures::EnableFledgeRealTimeReporting(false);
if (!base::FeatureList::IsEnabled(
blink::features::
kAlwaysAllowFledgeDeprecatedRenderURLReplacements)) {
WebRuntimeFeatures::EnableFledgeDeprecatedRenderURLReplacements(false);
}
}
// PermissionElement cannot be enabled without the support of the
// browser process.
if (!base::FeatureList::IsEnabled(blink::features::kPermissionElement)) {
LOG_IF(WARNING, WebRuntimeFeatures::IsPermissionElementEnabled())
<< "PermissionElement cannot be enabled in this configuration. Use --"
<< switches::kEnableFeatures << "="
<< blink::features::kPermissionElement.name << " instead.";
WebRuntimeFeatures::EnablePermissionElement(false);
}
}
} // namespace
namespace content {
void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
const base::CommandLine& command_line) {
// Sets experimental features.
bool enable_experimental_web_platform_features =
command_line.HasSwitch(switches::kEnableExperimentalWebPlatformFeatures);
bool enable_blink_test_features =
command_line.HasSwitch(switches::kEnableBlinkTestFeatures);
if (enable_blink_test_features) {
enable_experimental_web_platform_features = true;
WebRuntimeFeatures::EnableTestOnlyFeatures(true);
}
if (enable_experimental_web_platform_features) {
WebRuntimeFeatures::EnableExperimentalFeatures(true);
}
SetRuntimeFeatureDefaultsForPlatform(command_line);
// Sets origin trial features.
if (command_line.HasSwitch(
switches::kDisableOriginTrialControlledBlinkFeatures)) {
WebRuntimeFeatures::EnableOriginTrialControlledFeatures(false);
}
// TODO(rodneyding): add doc explaining ways to add new runtime features
// controls in the following functions.
SetRuntimeFeaturesFromChromiumFeatures();
SetRuntimeFeaturesFromCommandLine(command_line);
SetCustomizedRuntimeFeaturesFromCombinedArgs(command_line);
// Enable explicitly enabled features, and then disable explicitly disabled
// ones.
for (const std::string& feature :
FeaturesFromSwitch(command_line, switches::kEnableBlinkFeatures)) {
WebRuntimeFeatures::EnableFeatureFromString(feature, true);
}
for (const std::string& feature :
FeaturesFromSwitch(command_line, switches::kDisableBlinkFeatures)) {
WebRuntimeFeatures::EnableFeatureFromString(feature, false);
}
ResolveInvalidConfigurations();
}
} // namespace content