Add a feature for not compositing small scrollers

third_party/WebKit/Source/platform/exported/WebRuntimeFeatures.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 150 matching lines @@
 }
 
 void WebRuntimeFeatures::EnableMediaDocumentDownloadButton(bool enable) {
   RuntimeEnabledFeatures::setMediaDocumentDownloadButtonEnabled(enable);
 }
 
 void WebRuntimeFeatures::EnableMediaSession(bool enable) {
   RuntimeEnabledFeatures::setMediaSessionEnabled(enable);
 }
 
+void WebRuntimeFeatures::EnableNotCompositeSmallScroller(bool enable) {
+  RuntimeEnabledFeatures::setNotCompositeSmallScrollerEnabled(enable);
+}
+
 void WebRuntimeFeatures::EnableNotificationConstructor(bool enable) {
   RuntimeEnabledFeatures::setNotificationConstructorEnabled(enable);
 }
 
 void WebRuntimeFeatures::EnableNotificationContentImage(bool enable) {
   RuntimeEnabledFeatures::setNotificationContentImageEnabled(enable);
 }
 
 void WebRuntimeFeatures::EnableNotifications(bool enable) {
   RuntimeEnabledFeatures::setNotificationsEnabled(enable);
@@ skipping 211 matching lines @@
 
 void WebRuntimeFeatures::EnableMediaControlsOverlayPlayButton(bool enable) {
   RuntimeEnabledFeatures::setMediaControlsOverlayPlayButtonEnabled(enable);
 }
 
 void WebRuntimeFeatures::EnableLocationHardReload(bool enable) {
   RuntimeEnabledFeatures::setLocationHardReloadEnabled(enable);
 }
 
 }  // namespace blink