Win Video Capture: add support for WDM capture devices using a WDM Crossbar filter.

media/video/capture/win/video_capture_device_win.h

Index: media/video/capture/win/video_capture_device_win.h
diff --git a/media/video/capture/win/video_capture_device_win.h b/media/video/capture/win/video_capture_device_win.h
index 48bc5e6ec28d61cc80268620d715f1c86b4abb06..1338f90cb6c161b7b6bc0f6b15f3aead6e86656a 100644
--- a/media/video/capture/win/video_capture_device_win.h
+++ b/media/video/capture/win/video_capture_device_win.h
@@ -54,6 +54,7 @@ class VideoCaptureDeviceWin
   };
 
   static HRESULT GetDeviceFilter(const std::string& device_id,
+                                 const CLSID device_class_id,
                                  IBaseFilter** filter);
   static bool PinMatchesCategory(IPin* pin, REFGUID category);
   static base::win::ScopedComPtr<IPin> GetPin(IBaseFilter* filter,
@@ -86,6 +87,8 @@ class VideoCaptureDeviceWin
 
   bool CreateCapabilityMap();
   void SetAntiFlickerInCaptureFilter();
+  HRESULT InstantiateWDMFiltersAndPins();
+  HRESULT AddWDMCrossbarFilterToGraphAndConnect();
   void SetErrorState(const std::string& reason);
 
   Name device_name_;
@@ -101,6 +104,11 @@ class VideoCaptureDeviceWin
   base::win::ScopedComPtr<IBaseFilter> mjpg_filter_;
   base::win::ScopedComPtr<IPin> input_mjpg_pin_;
   base::win::ScopedComPtr<IPin> output_mjpg_pin_;
+  // Used for WDM devices as specified by |device_name_|. These devices need a
+  // WDM Crossbar Filter upstream from the Capture filter.
+  base::win::ScopedComPtr<IBaseFilter> crossbar_filter_;
+  base::win::ScopedComPtr<IPin> crossbar_video_output_pin_;
+  base::win::ScopedComPtr<IPin> analog_video_input_pin_;
 
   scoped_refptr<SinkFilter> sink_filter_;