Revert "Add a flag for enabling/disabling the new accelerated scrolling path"

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index b2f016960d8ecda8aba7f805a636894b444577dc..2f1b9d001fa3014110a63d76184f2bfbf810cc0d 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -521,14 +521,6 @@ WebPreferences WebContentsImpl::GetWebkitPrefs(RenderViewHost* rvh,
   if (command_line.HasSwitch(switches::kDisableAcceleratedOverflowScroll))
     prefs.accelerated_compositing_for_overflow_scroll_enabled = false;
 
-  prefs.universal_accelerated_compositing_for_overflow_scroll_enabled = false;
-  if (command_line.HasSwitch(
-          switches::kEnableUniversalAcceleratedOverflowScroll))
-    prefs.universal_accelerated_compositing_for_overflow_scroll_enabled = true;
-  if (command_line.HasSwitch(
-          switches::kDisableUniversalAcceleratedOverflowScroll))
-    prefs.universal_accelerated_compositing_for_overflow_scroll_enabled = false;
-
   prefs.accelerated_compositing_for_scrollable_frames_enabled =
       command_line.HasSwitch(switches::kEnableAcceleratedScrollableFrames);
   prefs.composited_scrolling_for_frames_enabled =