Cleanup namespace usage in platform/fonts/.

Source/platform/fonts/FontRenderStyle.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
  * copyright notice, this list of conditions and the following disclaimer
@@ skipping 54 matching lines @@
     //   NoPreference: no preference expressed
     char useBitmaps; // use embedded bitmap strike if possible
     char useAutoHint; // use 'auto' hinting (FreeType specific)
     char useHinting; // hint glyphs to the pixel grid
     char hintStyle; // level of hinting, 0..3
     char useAntiAlias; // antialias glyph shapes
     char useSubpixelRendering; // use subpixel rendering (partially-filled pixels)
     char useSubpixelPositioning; // use subpixel positioning (fractional X positions for glyphs)
 };
 
-}
+} // namespace blink
 
 #endif // FontRenderStyle_h