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

Source/platform/Supplementable.h

 /*
  * Copyright (C) 2012 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:
  * 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 266 matching lines @@
         // No tracing of off-heap supplements. We should not have any Supplementable
         // object on the heap. Either the object is HeapSupplementable or if it is
         // off heap it should use PersistentHeapSupplementable to trace any on-heap
         // supplements.
         COMPILE_ASSERT(!IsGarbageCollectedType<T>::value, GarbageCollectedObjectMustBeHeapSupplementable);
         SupplementableBase<T, false>::trace(visitor);
     }
 };
 
 template<typename T>
-struct ThreadingTrait<blink::SupplementBase<T, true> > {
+struct ThreadingTrait<SupplementBase<T, true> > {
     static const ThreadAffinity Affinity = ThreadingTrait<T>::Affinity;
 };
 
 template<typename T>
-struct ThreadingTrait<blink::SupplementableBase<T, true> > {
+struct ThreadingTrait<SupplementableBase<T, true> > {
     static const ThreadAffinity Affinity = ThreadingTrait<T>::Affinity;
 };
 
 } // namespace blink
 
 #endif // Supplementable_h