Windows video capture: Remove duplicated code from GetDeviceSupportedFormats*

media/video/capture/win/video_capture_device_mf_win.h

Index: media/video/capture/win/video_capture_device_mf_win.h
diff --git a/media/video/capture/win/video_capture_device_mf_win.h b/media/video/capture/win/video_capture_device_mf_win.h
index fc11d19289a85bcec18e9c1d8c500bb70f9f0b73..e17896dc77a9e75e60d33e1525575cf6f93b9486 100644
--- a/media/video/capture/win/video_capture_device_mf_win.h
+++ b/media/video/capture/win/video_capture_device_mf_win.h
@@ -19,6 +19,7 @@
 #include "base/win/scoped_comptr.h"
 #include "media/base/media_export.h"
 #include "media/video/capture/video_capture_device.h"
+#include "media/video/capture/win/capability_list_win.h"
 
 interface IMFSourceReader;
 
@@ -34,6 +35,8 @@ class MEDIA_EXPORT VideoCaptureDeviceMFWin
       public VideoCaptureDevice {
  public:
   static bool FormatFromGuid(const GUID& guid, VideoPixelFormat* format);
+  static HRESULT FillCapabilities(IMFSourceReader* source,
+                                  CapabilityList* capabilities);
 
   explicit VideoCaptureDeviceMFWin(const Name& device_name);
   virtual ~VideoCaptureDeviceMFWin();