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

Source/platform/PurgeableVector.h

 /*
  * Copyright (C) 2014 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
@@ skipping 22 matching lines @@
 
 #include "platform/PlatformExport.h"
 #include "wtf/Forward.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class WebDiscardableMemory;
 
-} // namespace blink
-
-namespace blink {
-
 // A simple vector implementation that supports purgeable memory. The vector is
 // already locked at construction and locking uses an internal counter which
 // means that N calls to lock() must be followed by N+1 calls to unlock() to
 // actually make the vector purgeable.
 class PLATFORM_EXPORT PurgeableVector {
     WTF_MAKE_NONCOPYABLE(PurgeableVector);
 public:
     enum PurgeableOption {
         NotPurgeable,
         Purgeable,
@@ skipping 51 matching lines @@
 
     bool reservePurgeableCapacity(size_t capacity, PurgeableAllocationStrategy);
 
     size_t adjustPurgeableCapacity(size_t capacity) const;
 
     // Vector used when the instance is constructed without the purgeability
     // hint or when discardable memory allocation fails.
     // Note that there can't be data both in |m_vector| and
     // |m_discardable|, i.e. only one of them is used at a given time.
     Vector<char> m_vector;
-    OwnPtr<blink::WebDiscardableMemory> m_discardable;
+    OwnPtr<WebDiscardableMemory> m_discardable;
     size_t m_discardableCapacity;
     size_t m_discardableSize;
     bool m_isPurgeable;
     int m_locksCount;
 };
 
 } // namespace blink
 
 #endif // PurgeableVector_h