Cleanup blink:: prefix usage in Source/core/modules/[mediasource/*.cpp to websockets/*.cpp]

Source/modules/screen_orientation/ScreenOrientationDispatcher.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/screen_orientation/ScreenOrientationDispatcher.h"
 
 #include "public/platform/Platform.h"
 
 namespace blink {
 
 ScreenOrientationDispatcher& ScreenOrientationDispatcher::instance()
 {
     DEFINE_STATIC_LOCAL(ScreenOrientationDispatcher, screenOrientationDispatcher, ());
     return screenOrientationDispatcher;
 }
 
 ScreenOrientationDispatcher::ScreenOrientationDispatcher()
 {
 }
 
 ScreenOrientationDispatcher::~ScreenOrientationDispatcher()
 {
 }
 
 void ScreenOrientationDispatcher::startListening()
 {
-    blink::Platform::current()->startListening(WebPlatformEventScreenOrientation, 0);
+    Platform::current()->startListening(WebPlatformEventScreenOrientation, 0);
 }
 
 void ScreenOrientationDispatcher::stopListening()
 {
-    blink::Platform::current()->stopListening(WebPlatformEventScreenOrientation);
+    Platform::current()->stopListening(WebPlatformEventScreenOrientation);
 }
 
 } // namespace blink