Rename WebCore to blink in Modules

Source/modules/push_messaging/PushRegistration.cpp

 // 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.
 
 #include "config.h"
 #include "modules/push_messaging/PushRegistration.h"
 
-namespace WebCore {
+namespace blink {
 
 PushRegistration::PushRegistration(const String& pushEndpoint, const String& pushRegistrationId)
     : m_pushEndpoint(pushEndpoint)
     , m_pushRegistrationId(pushRegistrationId)
 {
     ScriptWrappable::init(this);
 }
 
 PushRegistration::~PushRegistration()
 {
 }
 
-} // namespace WebCore
+} // namespace blink