Cleanup namespace usage in public/platform/{Web[P-W]*,linux/*}.h

public/platform/WebWorkerRunLoop.h

 /*
  * Copyright (C) 2011 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 10 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebWorkerRunLoop_h
 #define WebWorkerRunLoop_h
 
 #include "WebCommon.h"
 
 namespace blink {
+
 class WorkerThread;
-}
-
-namespace blink {
 
 class WebWorkerRunLoop {
 public:
     class Task {
     public:
         virtual ~Task() { }
         virtual void Run() = 0;
     };
 
     // Returns true if the task was posted to a non-terminated loop.
     BLINK_EXPORT bool postTask(Task*);
     BLINK_EXPORT bool equals(const WebWorkerRunLoop&) const;
     BLINK_EXPORT bool lessThan(const WebWorkerRunLoop&) const;
 
 #if BLINK_IMPLEMENTATION
-    WebWorkerRunLoop(blink::WorkerThread*);
+    WebWorkerRunLoop(WorkerThread*);
 #endif
 
 private:
-    blink::WorkerThread* m_workerThread;
+    WorkerThread* m_workerThread;
 };
 
 inline bool operator==(const WebWorkerRunLoop& a, const WebWorkerRunLoop& b)
 {
     return a.equals(b);
 }
 
 inline bool operator<(const WebWorkerRunLoop& a, const WebWorkerRunLoop& b)
 {
     return a.lessThan(b);
 }
 
 }
 
 #endif