Cleanup namespace usage in Source/core/modules/[mediasource/* to websockets/*]

Source/modules/push_messaging/PushController.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PushController_h
 #define PushController_h
 
 #include "core/page/Page.h"
 #include "platform/Supplementable.h"
 #include "wtf/Forward.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
+
 class WebPushClient;
-} // namespace blink
-
-namespace blink {
 
 class PushController FINAL : public NoBaseWillBeGarbageCollected<PushController>, public WillBeHeapSupplement<Page> {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PushController);
     WTF_MAKE_NONCOPYABLE(PushController);
 
 public:
-    static PassOwnPtrWillBeRawPtr<PushController> create(blink::WebPushClient*);
+    static PassOwnPtrWillBeRawPtr<PushController> create(WebPushClient*);
     static const char* supplementName();
     static PushController* from(Page* page) { return static_cast<PushController*>(WillBeHeapSupplement<Page>::from(page, supplementName())); }
-    static blink::WebPushClient* clientFrom(Page*);
+    static WebPushClient* clientFrom(Page*);
 
-    blink::WebPushClient* client() const { return m_client; }
+    WebPushClient* client() const { return m_client; }
 
     virtual void trace(Visitor* visitor) OVERRIDE { WillBeHeapSupplement<Page>::trace(visitor); }
 
 private:
-    explicit PushController(blink::WebPushClient*);
+    explicit PushController(WebPushClient*);
 
-    blink::WebPushClient* m_client;
+    WebPushClient* m_client;
 };
 
-void providePushControllerTo(Page&, blink::WebPushClient*);
+void providePushControllerTo(Page&, WebPushClient*);
 
 } // namespace blink
 
 #endif // PushController_h