[cc] Rename all cc/ filenames to Chromium style

cc/TreeSynchronizer.h

-// Copyright 2011 The Chromium Authors. All rights reserved.
+// Copyright 2012 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 TreeSynchronizer_h
-#define TreeSynchronizer_h
-
-#include "base/basictypes.h"
-#include "base/memory/scoped_ptr.h"
-#include "cc/scoped_ptr_hash_map.h"
-
-namespace cc {
-
-class CCLayerImpl;
-class CCLayerTreeHostImpl;
-class LayerChromium;
-
-class TreeSynchronizer {
-public:
-    // Accepts a LayerChromium tree and returns a reference to a CCLayerImpl tree that duplicates the structure
-    // of the LayerChromium tree, reusing the CCLayerImpls in the tree provided by oldCCLayerImplRoot if possible.
-    static scoped_ptr<CCLayerImpl> synchronizeTrees(LayerChromium* layerRoot, scoped_ptr<CCLayerImpl> oldCCLayerImplRoot, CCLayerTreeHostImpl*);
-
-private:
-    TreeSynchronizer(); // Not instantiable.
-
-    typedef ScopedPtrHashMap<int, CCLayerImpl> ScopedPtrCCLayerImplMap;
-    typedef base::hash_map<int, CCLayerImpl*> RawPtrCCLayerImplMap;
-
-    // Declared as static member functions so they can access functions on LayerChromium as a friend class.
-    static scoped_ptr<CCLayerImpl> reuseOrCreateCCLayerImpl(RawPtrCCLayerImplMap& newLayers, ScopedPtrCCLayerImplMap& oldLayers, LayerChromium*);
-    static void collectExistingCCLayerImplRecursive(ScopedPtrCCLayerImplMap& oldLayers, scoped_ptr<CCLayerImpl>);
-    static scoped_ptr<CCLayerImpl> synchronizeTreeRecursive(RawPtrCCLayerImplMap& newLayers, ScopedPtrCCLayerImplMap& oldLayers, LayerChromium*, CCLayerTreeHostImpl*);
-    static void updateScrollbarLayerPointersRecursive(const RawPtrCCLayerImplMap& newLayers, LayerChromium*);
-
-    DISALLOW_COPY_AND_ASSIGN(TreeSynchronizer);
-};
-
-} // namespace cc
-
-#endif // TreeSynchronizer_h
+// Temporary forwarding header
+#include "cc/tree_synchronizer.h"