Add --{enable,disable}-blink-features flags which set RuntimeEnabledFeatures.

content/public/common/content_switches.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/public/common/content_switches.h"
 
 namespace switches {
 
 // The number of MSAA samples for canvas2D. Requires MSAA support by GPU to
 // have an effect. 0 disables MSAA.
@@ skipping 66 matching lines @@
 const char kDisableAccelerated2dCanvas[]    = "disable-accelerated-2d-canvas";
 
 // Disables hardware acceleration of video decode, where available.
 const char kDisableAcceleratedVideoDecode[] =
     "disable-accelerated-video-decode";
 
 // Disable limits on the number of backing stores. Can prevent blinking for
 // users with many windows/tabs and lots of memory.
 const char kDisableBackingStoreLimit[]      = "disable-backing-store-limit";
 
+// Disable one or more Blink runtime-enabled features.
+// Use names from RuntimeEnabledFeatures.in, separated by commas.
+// Applied after kEnableBlinkFeatures, and after other flags that change these
+// features.
+const char kDisableBlinkFeatures[]          = "disable-blink-features";
+
 // Disable the Blink Scheduler. Ensures there's no reordering of blink tasks.
 // This switch is intended only for performance tests.
 const char kDisableBlinkScheduler[]         = "disable-blink-scheduler";
 
 // Disable the creation of compositing layers when it would prevent LCD text.
 const char kDisablePreferCompositingToLCDText[] =
     "disable-prefer-compositing-to-lcd-text";
 
 // Disables HTML5 DB support.
 const char kDisableDatabases[]              = "disable-databases";
@@ skipping 181 matching lines @@
 // Enable the experimental Credential Manager JavaScript API.
 const char kEnableCredentialManagerAPI[]    = "enable-credential-manager-api";
 
 // Use a BeginFrame signal from browser to renderer to schedule rendering.
 const char kEnableBeginFrameScheduling[]    = "enable-begin-frame-scheduling";
 
 // Enable the creation of compositing layers when it would prevent LCD text.
 const char kEnablePreferCompositingToLCDText[] =
     "enable-prefer-compositing-to-lcd-text";
 
+// Disable one or more Blink runtime-enabled features.
+// Use names from RuntimeEnabledFeatures.in, separated by commas.
+// Applied before kDisableBlinkFeatures, and after other flags that change these
+// features.
+const char kEnableBlinkFeatures[]           = "enable-blink-features";
+
 // PlzNavigate: Use the experimental browser-side navigation path.
 const char kEnableBrowserSideNavigation[]   = "enable-browser-side-navigation";
 
 // Defer image decoding in WebKit until painting.
 const char kEnableDeferredImageDecoding[]   = "enable-deferred-image-decoding";
 
 // Enables Delay Agnostic AEC in WebRTC.
 const char kEnableDelayAgnosticAec[]        = "enable-delay-agnostic-aec";
 
 // Enables delegated renderer.
@@ skipping 657 matching lines @@
 const char kEnableNpapi[]                   = "enable-npapi";
 
 #if defined(ENABLE_PLUGINS)
 // Enables the plugin power saver feature.
 const char kEnablePluginPowerSaver[] = "enable-plugin-power-saver";
 #endif
 
 // Don't dump stuff here, follow the same order as the header.
 
 }  // namespace switches