Remove base::Feature for RLS.

Bug: 823365
Change-Id: Ib9d707af46d45b4cd5c0eabacd91102f84ef000f
Reviewed-on: https://chromium-review.googlesource.com/1058035Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Commit-Queue: Steve Kobes <skobes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#558444}

content/child/runtime_features.cc

@@ -192,10 +192,6 @@ void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(
   if (command_line.HasSwitch(switches::kReducedReferrerGranularity))
     WebRuntimeFeatures::EnableReducedReferrerGranularity(true);
 
-  WebRuntimeFeatures::EnableRootLayerScrolling(
-      base::FeatureList::IsEnabled(features::kRootLayerScrolling) ||
-      enableExperimentalWebPlatformFeatures);
-
   if (command_line.HasSwitch(switches::kDisablePermissionsAPI))
     WebRuntimeFeatures::EnablePermissionsAPI(false);
 

content/public/common/content_features.cc

@@ -311,10 +311,6 @@ const base::Feature kResamplingInputEvents{"ResamplingInputEvents",
 const base::Feature kResourceLoadScheduler{"ResourceLoadScheduler",
                                            base::FEATURE_DISABLED_BY_DEFAULT};
 
-// Use common overflow scroll mechanism for frames. See http://crbug.com/417782.
-const base::Feature kRootLayerScrolling{"RootLayerScrolling",
-                                        base::FEATURE_ENABLED_BY_DEFAULT};
-
 // Run video capture service in the Browser process as opposed to a dedicated
 // utility process
 const base::Feature kRunVideoCaptureServiceInBrowserProcess{

content/public/common/content_features.h

@@ -75,7 +75,6 @@ CONTENT_EXPORT extern const base::Feature kRenderingPipelineThrottling;
 CONTENT_EXPORT extern const base::Feature kRequireCSSExtensionForFile;
 CONTENT_EXPORT extern const base::Feature kResamplingInputEvents;
 CONTENT_EXPORT extern const base::Feature kResourceLoadScheduler;
-CONTENT_EXPORT extern const base::Feature kRootLayerScrolling;
 CONTENT_EXPORT extern const base::Feature
     kRunVideoCaptureServiceInBrowserProcess;
 CONTENT_EXPORT extern const base::Feature kScrollAnchoring;

third_party/blink/public/platform/web_runtime_features.h

@@ -128,7 +128,6 @@ class WebRuntimeFeatures {
   BLINK_PLATFORM_EXPORT static void EnableRenderingPipelineThrottling(bool);
   BLINK_PLATFORM_EXPORT static void EnableRequireCSSExtensionForFile(bool);
   BLINK_PLATFORM_EXPORT static void EnableResourceLoadScheduler(bool);
-  BLINK_PLATFORM_EXPORT static void EnableRootLayerScrolling(bool);
   BLINK_PLATFORM_EXPORT static void EnableScriptedSpeech(bool);
   BLINK_PLATFORM_EXPORT static void EnableScrollAnchoring(bool);
   BLINK_PLATFORM_EXPORT static void EnableScrollAnchorSerialization(bool);

third_party/blink/renderer/platform/exported/web_runtime_features.cc

@@ -384,10 +384,6 @@ void WebRuntimeFeatures::EnableExpensiveBackgroundTimerThrottling(bool enable) {
   RuntimeEnabledFeatures::SetExpensiveBackgroundTimerThrottlingEnabled(enable);
 }
 
-void WebRuntimeFeatures::EnableRootLayerScrolling(bool enable) {
-  RuntimeEnabledFeatures::SetRootLayerScrollingEnabled(enable);
-}
-
 void WebRuntimeFeatures::EnableScrollAnchoring(bool enable) {
   RuntimeEnabledFeatures::SetScrollAnchoringEnabled(enable);
 }

third_party/blink/renderer/platform/runtime_enabled_features.json5

@@ -1072,8 +1072,6 @@
     },
     // Handles frame scrolling via the root PaintLayer instead of the FrameView.
     // The master bug for the root layer scrolling project is crbug.com/417782.
-    // This REF is enabled iff features::kRootLayerScrolling is on or
-    // experimental web platform features are enabled.
     {
       name: "RootLayerScrolling",
       status: "stable",