Cleanup namespace usage in platform/fonts/.

Source/platform/fonts/GlyphPageTreeNode.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 384 matching lines @@
             printf("%s\t%p %s\n", indent.data(), it->key, it->key->description().utf8().data());
             it->value->showSubtree();
         }
         if (m_systemFallbackChild) {
             printf("%s\t* fallback\n", indent.data());
             m_systemFallbackChild->showSubtree();
         }
     }
 #endif
 
-}
+} // namespace blink
 
 #ifndef NDEBUG
 void showGlyphPageTrees()
 {
     printf("Page 0:\n");
     showGlyphPageTree(0);
     HashMap<int, blink::GlyphPageTreeNode*>::iterator end = blink::GlyphPageTreeNode::roots->end();
     for (HashMap<int, blink::GlyphPageTreeNode*>::iterator it = blink::GlyphPageTreeNode::roots->begin(); it != end; ++it) {
         printf("\nPage %d:\n", it->key);
         showGlyphPageTree(it->key);
     }
 }
 
 void showGlyphPageTree(unsigned pageNumber)
 {
     blink::GlyphPageTreeNode::getRoot(pageNumber)->showSubtree();
 }
 #endif