cc: GPU rasterize tiles synchronously in PrepareToDraw

cc/trees/thread_proxy.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/thread_proxy.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 1035 matching lines @@
   if (result == DRAW_SUCCESS)
     impl().timing_history.DidFinishDrawing();
 
   DCHECK_NE(INVALID_RESULT, result);
   return result;
 }
 
 void ThreadProxy::ScheduledActionManageTiles() {
   TRACE_EVENT0("cc", "ThreadProxy::ScheduledActionManageTiles");
   DCHECK(impl().layer_tree_host_impl->settings().impl_side_painting);
-  impl().layer_tree_host_impl->ManageTiles();
+  if (!impl().layer_tree_host_impl->use_gpu_rasterization())
+    impl().layer_tree_host_impl->ManageTiles();
 }
 
 DrawResult ThreadProxy::ScheduledActionDrawAndSwapIfPossible() {
   TRACE_EVENT0("cc", "ThreadProxy::ScheduledActionDrawAndSwap");
 
   // SchedulerStateMachine::DidDrawIfPossibleCompleted isn't set up to
   // handle DRAW_ABORTED_CANT_DRAW.  Moreover, the scheduler should
   // never generate this call when it can't draw.
   DCHECK(impl().layer_tree_host_impl->CanDraw());
 
@@ skipping 274 matching lines @@
 
   impl().timing_history.DidActivateSyncTree();
 }
 
 void ThreadProxy::DidManageTiles() {
   DCHECK(IsImplThread());
   impl().scheduler->DidManageTiles();
 }
 
 }  // namespace cc