Add enable-accelerated-compositing-for-overflow-scroll switch.


This is to turn on https://bugs.webkit.org/show_bug.cgi?id=94743.

BUG=None

Review URL: https://chromiumcodereview.appspot.com/10918079

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@157123 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 1bd9332c..54a5e17 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -490,6 +490,9 @@
       command_line.HasSwitch(switches::kShowCompositedLayerTree);
   prefs.show_fps_counter =
       command_line.HasSwitch(switches::kShowFPSCounter);
+  prefs.accelerated_compositing_for_overflow_scroll_enabled =
+      command_line.HasSwitch(
+          switches::kEnableAcceleratedCompositingForOverflowScroll);
   prefs.show_paint_rects =
       command_line.HasSwitch(switches::kShowPaintRects);
   prefs.render_vsync_enabled =