Windows video capture: Remove duplicated code from GetDeviceSupportedFormats*

media/video/capture/win/video_capture_device_win.cc

Index: media/video/capture/win/video_capture_device_win.cc
diff --git a/media/video/capture/win/video_capture_device_win.cc b/media/video/capture/win/video_capture_device_win.cc
index d1ee6fc5e181e86cc2c9b7efe8fb785df9a16e34..750ceb32405c24b61b821bb2f80bc14fac934365 100644
--- a/media/video/capture/win/video_capture_device_win.cc
+++ b/media/video/capture/win/video_capture_device_win.cc
@@ -554,6 +554,13 @@ bool VideoCaptureDeviceWin::CreateCapabilityMap() {
   return !capabilities_.empty();
 }
 
+void VideoCaptureDeviceWin::GetDeviceSupportedFormats(
+    VideoCaptureFormats* formats) {
+  DCHECK(formats);
+  for (const CapabilityWin& capability : capabilities_)
+    formats->push_back(capability.supported_format);
+}
+
 // Set the power line frequency removal in |capture_filter_| if available.
 void VideoCaptureDeviceWin::SetAntiFlickerInCaptureFilter() {
   const int power_line_frequency = GetPowerLineFrequencyForLocation();