Cleanup namespace usage in Source/core/platform/[A-Z]*.h

Source/platform/NotImplemented.h

 /*
  * Copyright (C) 2007 Apple Computer, 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 
 #include "platform/PlatformExport.h"
 #include "wtf/Assertions.h"
 
 #if LOG_DISABLED
     #define notImplemented() ((void)0)
 #else
 
 namespace blink {
 PLATFORM_EXPORT WTFLogChannel* notImplementedLoggingChannel();
-}
+} // namespace blink
 
 #define notImplemented() do { \
         static bool havePrinted = false; \
         if (!havePrinted) { \
             WTFLogVerbose(__FILE__, __LINE__, WTF_PRETTY_FUNCTION, blink::notImplementedLoggingChannel(), "UNIMPLEMENTED: "); \
             havePrinted = true; \
         } \
     } while (0)
 
 #endif // NDEBUG
 
 #endif // NotImplemented_h