Replace hardcoded constant in video capture with macro.

webrtc/modules/video_capture/windows/video_capture_ds.cc

Index: webrtc/modules/video_capture/windows/video_capture_ds.cc
diff --git a/webrtc/modules/video_capture/windows/video_capture_ds.cc b/webrtc/modules/video_capture/windows/video_capture_ds.cc
index dcef2d4706b0b8d0fb6093e5b3fcb56d8d654847..fe2ca7e7d0bf0a2ac1cb184e36ebc8b657eedc21 100644
--- a/webrtc/modules/video_capture/windows/video_capture_ds.cc
+++ b/webrtc/modules/video_capture/windows/video_capture_ds.cc
@@ -395,7 +395,7 @@ HRESULT VideoCaptureDS::ConnectDVCamera()
     hr = _graphBuilder->ConnectDirect(_outputDvPin, _inputSendPin, NULL);
     if (hr != S_OK)
     {
-        if (hr == (long)0x80070004)
+        if (hr == HRESULT_FROM_WIN32(ERROR_TOO_MANY_OPEN_FILES))
         {
             WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideoCapture, _id,
                          "Failed to connect the capture device, busy");