cc: Commit directly to active tree when using single thread.

cc/trees/layer_tree_host_impl.h

 // 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.
 
 #ifndef CC_TREES_LAYER_TREE_HOST_IMPL_H_
 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 528 matching lines @@
   Proxy* proxy_;
 
  private:
   void CreateAndSetRenderer();
   void CreateAndSetTileManager();
   void DestroyTileManager();
   void ReleaseTreeResources();
   void RecreateTreeResources();
   void EnforceZeroBudget(bool zero_budget);
 
-  bool UsePendingTreeForSync() const;
   bool IsSynchronousSingleThreaded() const;
 
   // Scroll by preferring to move the outer viewport first, only moving the
   // inner if the outer is at its scroll extents.
   void ScrollViewportBy(gfx::Vector2dF scroll_delta);
   // Scroll by preferring to move the inner viewport first, only moving the
   // outer if the inner is at its scroll extents.
   void ScrollViewportInnerFirst(gfx::Vector2dF scroll_delta);
   void AnimatePageScale(base::TimeTicks monotonic_time);
   void AnimateScrollbars(base::TimeTicks monotonic_time);
@@ skipping 174 matching lines @@
   bool is_likely_to_require_a_draw_;
 
   scoped_ptr<FrameTimingTracker> frame_timing_tracker_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_HOST_IMPL_H_