cc: Fix header include guards.

cc/image_layer_updater.h

Index: cc/image_layer_updater.h
diff --git a/cc/image_layer_updater.h b/cc/image_layer_updater.h
index 70474e9c73fb0cd7df285ae797feb71cc248769b..fcb2efc9a2ff65b9d80b0a1c43a7af049db8d176 100644
--- a/cc/image_layer_updater.h
+++ b/cc/image_layer_updater.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ImageLayerUpdater_h
-#define ImageLayerUpdater_h
+#ifndef CC_IMAGE_LAYER_UPDATER_H_
+#define CC_IMAGE_LAYER_UPDATER_H_
 
 #include "cc/layer_updater.h"
 
@@ -43,6 +43,6 @@ private:
     SkBitmap m_bitmap;
 };
 
-}
+}  // namespace cc
 
-#endif
+#endif  // CC_IMAGE_LAYER_UPDATER_H_