Cleanup namespace usage in platform/fonts/.

Source/platform/fonts/opentype/OpenTypeUtilities.cpp

 /*
  * Copyright (C) 2008, 2009 Apple Inc.  All rights reserved.
  * Copyright (C) 2009 Torch Mobile, Inc.
  *
  * 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 203 matching lines @@
     HANDLE fontHandle = AddFontMemResourceEx(rewrittenFontData.data(), fontData->size() + nameTableSize, 0, &numFonts);
 
     if (fontHandle && numFonts < 1) {
         RemoveFontMemResourceEx(fontHandle);
         return 0;
     }
 
     return fontHandle;
 }
 
-}
+} // namespace blink