switch to DVLOG from VLOG, and move struct definition to cc file

content/browser/renderer_host/media/media_stream_dispatcher_host.h

 // Copyright (c) 2011 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 CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_
 
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 45 matching lines @@
 
   void OnStopGeneratedStream(int render_view_id, const std::string& label);
 
   // Returns the media stream manager to forward events to,
   // creating one if needed.
   MediaStreamManager* manager();
 
   const content::ResourceContext* resource_context_;
   int render_process_id_;
 
-  struct StreamRequest {
-    StreamRequest() {}
-    StreamRequest(int render_view_id, int page_request_id)
-        : render_view_id(render_view_id),
-          page_request_id(page_request_id ) {
-    }
-    int render_view_id;
-    // Id of the request generated by MediaStreamDispatcher.
-    int page_request_id;
-  };
+  struct StreamRequest;
   typedef std::map<std::string, StreamRequest> StreamMap;
   // Streams generated for this host.
   StreamMap streams_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDispatcherHost);
 };
 
 }  // namespace media_stream
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_DISPATCHER_HOST_H_