Log error messages in windows video capture

media/video/capture/win/video_capture_device_mf_win.cc

Index: media/video/capture/win/video_capture_device_mf_win.cc
diff --git a/media/video/capture/win/video_capture_device_mf_win.cc b/media/video/capture/win/video_capture_device_mf_win.cc
index de1f6eb2dfff6056305637b94937a86eedae0b95..16475d8ce29f3146fdc2d6d1a3604651e667b694 100644
--- a/media/video/capture/win/video_capture_device_mf_win.cc
+++ b/media/video/capture/win/video_capture_device_mf_win.cc
@@ -332,7 +332,12 @@ void VideoCaptureDeviceMFWin::OnIncomingCapturedData(
 }
 
 void VideoCaptureDeviceMFWin::OnError(HRESULT hr) {
-  std::string log_msg = base::StringPrintf("VideoCaptureDeviceMFWin: %x", hr);
+  const std::string last_err_msg =
+      logging::SystemErrorCodeToString(logging::GetLastSystemErrorCode());
+  const std::string log_msg =
+      base::StringPrintf("VideoCaptureDeviceMFWin: %x, OS message: %s",
+                         hr,
+                         last_err_msg.c_str());
   DLOG(ERROR) << log_msg;
   if (client_.get())
     client_->OnError(log_msg);