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

Source/platform/AsyncFileSystemCallbacks.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
@@ skipping 50 matching lines @@
     // Called when a snapshot file is created successfully.
     virtual void didCreateSnapshotFile(const FileMetadata&, PassRefPtr<BlobDataHandle> snapshot) { ASSERT_NOT_REACHED(); }
 
     // Called when a directory entry is read.
     virtual void didReadDirectoryEntry(const String& name, bool isDirectory) { ASSERT_NOT_REACHED(); }
 
     // Called after a chunk of directory entries have been read (i.e. indicates it's good time to call back to the application). If hasMore is true there can be more chunks.
     virtual void didReadDirectoryEntries(bool hasMore) { ASSERT_NOT_REACHED(); }
 
     // Called when an AsyncFileWrter has been created successfully.
-    virtual void didCreateFileWriter(PassOwnPtr<blink::WebFileWriter>, long long length) { ASSERT_NOT_REACHED(); }
+    virtual void didCreateFileWriter(PassOwnPtr<WebFileWriter>, long long length) { ASSERT_NOT_REACHED(); }
 
     // Called when there was an error.
     virtual void didFail(int code) = 0;
 
     // Returns true if the caller expects that the calling thread blocks
     // until completion.
     virtual bool shouldBlockUntilCompletion() const
     {
         return m_blockUntilCompletion;
     }
 
     void setShouldBlockUntilCompletion(bool flag)
     {
         m_blockUntilCompletion = flag;
     }
 
     virtual ~AsyncFileSystemCallbacks() { }
 
 private:
     bool m_blockUntilCompletion;
 };
 
-} // namespace
+} // namespace blink
 
 #endif // AsyncFileSystemCallbacks_h