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

content/browser/renderer_host/media/media_stream_manager.h

Index: content/browser/renderer_host/media/media_stream_manager.h
===================================================================
--- content/browser/renderer_host/media/media_stream_manager.h	(revision 109546)
+++ content/browser/renderer_host/media/media_stream_manager.h	(working copy)
@@ -89,26 +89,8 @@
 
  private:
   // Contains all data needed to keep track of requests.
-  struct DeviceRequest {
-    DeviceRequest();
-    DeviceRequest(MediaStreamRequester* requester,
-                  const StreamOptions& request_options);
-    ~DeviceRequest();
-    enum RequestState {
-      kNotRequested = 0,
-      kRequested,
-      kOpening,
-      kDone,
-      kError
-    };
+  struct DeviceRequest;
 
-    MediaStreamRequester* requester;
-    StreamOptions options;
-    std::vector<RequestState> state;
-    StreamDeviceInfoArray audio_devices;
-    StreamDeviceInfoArray video_devices;
-  };
-
   // Helpers.
   bool RequestDone(const MediaStreamManager::DeviceRequest& request) const;
   MediaStreamProvider* GetDeviceManager(MediaStreamType stream_type);