Cleanup namespace usage in Source/web/*.h

Source/web/CompositionUnderlineVectorBuilder.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 21 matching lines @@
 #define CompositionUnderlineVectorBuilder_h
 
 #include "core/editing/CompositionUnderline.h"
 #include "public/platform/WebVector.h"
 #include "public/web/WebCompositionUnderline.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 // This classes are used for converting from std::vector<WebCompositionUnderline>
-// to Vector<blink::CompositionUnderline>.
+// to Vector<CompositionUnderline>.
 
 class CompositionUnderlineVectorBuilder : public Vector<CompositionUnderline> {
 public:
     CompositionUnderlineVectorBuilder(const WebVector<WebCompositionUnderline>&);
 };
 
 } // namespace blink
 
 #endif