cc: Fix header include guards of our header files.

cc/layer_iterator.h

 // 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 CCLayerIterator_h
-#define CCLayerIterator_h
+#ifndef CC_LAYER_ITERATOR_H_
+#define CC_LAYER_ITERATOR_H_
 
 #include "base/memory/ref_counted.h"
 #include "cc/cc_export.h"
 #include "cc/layer_tree_host_common.h"
 
 namespace cc {
 
 // These classes provide means to iterate over the RenderSurfaceImpl-Layer tree.
 
 // Example code follows, for a tree of Layer/RenderSurface objects. See below for details.
@@ skipping 181 matching lines @@
         void next(LayerIterator<LayerType, LayerList, RenderSurfaceType, ActionType>&);
 
     private:
         template <typename LayerType, typename LayerList, typename RenderSurfaceType, typename ActionType>
         void goToHighestInSubtree(LayerIterator<LayerType, LayerList, RenderSurfaceType, ActionType>&);
     };
 };
 
 } // namespace cc
 
-#endif
+#endif  // CC_LAYER_ITERATOR_H_