Cleanup namespace usage in Source/core/{dom/* & fileapi/*}

Source/core/dom/RenderedDocumentMarker.h

 /*
  * Copyright (C) 2011 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.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 52 matching lines @@
 };
 
 inline void RenderedDocumentMarker::invalidate(const LayoutRect& r)
 {
     if (m_renderedRect.intersects(r))
         invalidate();
 }
 
 DEFINE_TYPE_CASTS(RenderedDocumentMarker, DocumentMarker, marker, true, true);
 
-} // namespace
+} // namespace blink
 
 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::RenderedDocumentMarker);
 
 #endif