Fix how we handle an empty capabilities list when enumerating video streams.

media/video/capture/win/video_capture_device_mf_win.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/video/capture/win/video_capture_device_mf_win.h"
 
 #include <mfapi.h>
 #include <mferror.h>
 
 #include "base/lazy_instance.h"
@@ skipping 120 matching lines @@
   ScopedComPtr<IMFMediaType> type;
   HRESULT hr;
   while (SUCCEEDED(hr = source->GetNativeMediaType(
       MF_SOURCE_READER_FIRST_VIDEO_STREAM, stream_index, type.Receive()))) {
     VideoCaptureCapabilityWin capability(stream_index++);
     if (FillCapabilitiesFromType(type, &capability))
       capabilities->Add(capability);
     type.Release();
   }
 
-  if (SUCCEEDED(hr) && capabilities->empty())
+  if (capabilities->empty() && (SUCCEEDED(hr) || hr == MF_E_NO_MORE_TYPES))
     hr = HRESULT_FROM_WIN32(ERROR_EMPTY);
 
   return (hr == MF_E_NO_MORE_TYPES) ? S_OK : hr;
 }
 
 bool LoadMediaFoundationDlls() {
   static const wchar_t* const kMfDLLs[] = {
     L"%WINDIR%\\system32\\mf.dll",
     L"%WINDIR%\\system32\\mfplat.dll",
     L"%WINDIR%\\system32\\mfreadwrite.dll",
@@ skipping 267 matching lines @@
   }
 }
 
 void VideoCaptureDeviceMFWin::OnError(HRESULT hr) {
   DLOG(ERROR) << "VideoCaptureDeviceMFWin: " << std::hex << hr;
   if (observer_)
     observer_->OnError();
 }
 
 }  // namespace media