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

Source/modules/push_messaging/PushRegistration.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 PushRegistration_h
 #define PushRegistration_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebPushRegistration.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class ScriptPromiseResolver;
 
 class PushRegistration FINAL : public GarbageCollectedFinalized<PushRegistration>, public ScriptWrappable {
 public:
     // For CallbackPromiseAdapter.
-    typedef blink::WebPushRegistration WebType;
+    typedef WebPushRegistration WebType;
     static PushRegistration* take(ScriptPromiseResolver*, WebType* registrationRaw);
     static void dispose(WebType* registrationRaw);
 
     virtual ~PushRegistration();
 
     const String& pushEndpoint() const { return m_pushEndpoint; }
     const String& pushRegistrationId() const { return m_pushRegistrationId; }
 
     void trace(Visitor*) { }
 
 private:
     PushRegistration(const String& pushEndpoint, const String& pushRegistrationId);
 
     String m_pushEndpoint;
     String m_pushRegistrationId;
 };
 
 } // namespace blink
 
 #endif // PushRegistration_h