Replace hardcoded constant in video capture with macro.

webrtc/modules/video_capture/windows/video_capture_ds.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 377 matching lines @@
     {
         WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideoCapture, _id,
                      "Failed to connect capture device to the dv devoder: %x",
                      hr);
         return hr;
     }
 
     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");
         }
         else
         {
             WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideoCapture, _id,
                          "Failed to connect capture device to the send graph: 0x%x",
                          hr);
         }
         return hr;
     }
     return hr;
 }
 }  // namespace videocapturemodule
 }  // namespace webrtc