Activate LayerImpl tree with sync+push instead of pointer swap

cc/tiled_layer_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_TILED_LAYER_IMPL_H_
 #define CC_TILED_LAYER_IMPL_H_
 
 #include "cc/cc_export.h"
 #include "cc/layer_impl.h"
 
 namespace cc {
 
 class LayerTilingData;
 class DrawableTile;
 
 class CC_EXPORT TiledLayerImpl : public LayerImpl {
 public:
     static scoped_ptr<TiledLayerImpl> create(LayerTreeImpl* treeImpl, int id)
     {
         return make_scoped_ptr(new TiledLayerImpl(treeImpl, id));
     }
     virtual ~TiledLayerImpl();
 
+    virtual scoped_ptr<LayerImpl> createLayerImpl(LayerTreeImpl*) OVERRIDE;
+    virtual void pushPropertiesTo(LayerImpl*) OVERRIDE;
+
     virtual void appendQuads(QuadSink&, AppendQuadsData&) OVERRIDE;
 
     virtual ResourceProvider::ResourceId contentsResourceId() const OVERRIDE;
 
     virtual void dumpLayerProperties(std::string*, int indent) const OVERRIDE;
 
     void setSkipsDraw(bool skipsDraw) { m_skipsDraw = skipsDraw; }
     void setTilingData(const LayerTilingData& tiler);
     void pushTileProperties(int, int, ResourceProvider::ResourceId, const gfx::Rect& opaqueRect, bool contentsSwizzled);
     void pushInvalidTile(int, int);
@@ skipping 17 matching lines @@
     DrawableTile* createTile(int, int);
 
     bool m_skipsDraw;
 
     scoped_ptr<LayerTilingData> m_tiler;
 };
 
 }
 
 #endif  // CC_TILED_LAYER_IMPL_H_