Revert 220418 "cc: Block commit on activate by setting a flag on..."

trunk/src/cc/trees/single_thread_proxy.cc

Index: trunk/src/cc/trees/single_thread_proxy.cc
===================================================================
--- trunk/src/cc/trees/single_thread_proxy.cc	(revision 220454)
+++ trunk/src/cc/trees/single_thread_proxy.cc	(working copy)
@@ -244,10 +244,6 @@
   SetNeedsRedrawRectOnImplThread(damage_rect);
 }
 
-void SingleThreadProxy::SetNextCommitWaitsForActivation() {
-  // There is no activation here other than commit. So do nothing.
-}
-
 void SingleThreadProxy::SetDeferCommits(bool defer_commits) {
   // Thread-only feature.
   NOTREACHED();