Update references to Blink's Platform API headers

content/renderer/media/video_source_handler.cc

 // Copyright (c) 2013 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 "content/renderer/media/video_source_handler.h"
 
 #include <string>
 
 #include "base/logging.h"
 #include "content/renderer/media/media_stream_dependency_factory.h"
 #include "content/renderer/media/media_stream_registry_interface.h"
 #include "content/renderer/render_thread_impl.h"
-#include "third_party/WebKit/Source/Platform/chromium/public/WebMediaStream.h"
+#include "third_party/WebKit/public/platform/WebMediaStream.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaStreamRegistry.h"
 #include "third_party/libjingle/source/talk/media/base/videoframe.h"
 #include "third_party/libjingle/source/talk/media/base/videorenderer.h"
 
 using cricket::VideoFrame;
 using cricket::VideoRenderer;
 using webrtc::VideoSourceInterface;
 
 namespace content {
 
@@ skipping 118 matching lines @@
   std::map<FrameReaderInterface*, VideoRenderer*>::iterator it;
   it = reader_to_receiver_.find(reader);
   if (it == reader_to_receiver_.end()) {
     return NULL;
   }
   return it->second;
 }
 
 }  // namespace content