Win Video Capture: Create an STA |video_capture_thread_| from MediaStreamManager.

content/browser/renderer_host/media/media_stream_dispatcher_host_unittest.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 <string>
 #include <queue>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
@@ skipping 216 matching lines @@
     // Make sure we use fake devices to avoid long delays.
     base::CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kUseFakeDeviceForMediaStream);
     // Create our own MediaStreamManager.
     media_stream_manager_.reset(new MediaStreamManager(audio_manager_.get()));
     video_capture_device_factory_ =
         static_cast<media::FakeVideoCaptureDeviceFactory*>(
             media_stream_manager_->video_capture_manager()
             ->video_capture_device_factory());
     DCHECK(video_capture_device_factory_);
+#if defined(OS_WIN)
+    // Override the Video Capture Thread that MediaStreamManager constructs.
+    media_stream_manager_->video_capture_manager()->Unregister();
+    media_stream_manager_->video_capture_manager()->Register(
+        media_stream_manager_.get(),
+        base::MessageLoopProxy::current());
+#endif
 
     MockResourceContext* mock_resource_context =
         static_cast<MockResourceContext*>(
             browser_context_.GetResourceContext());
 
     host_ = new MockMediaStreamDispatcherHost(
         mock_resource_context->GetMediaDeviceIDSalt(),
         base::MessageLoopProxy::current(),
         media_stream_manager_.get());
 
@@ skipping 666 matching lines @@
 
 TEST_F(MediaStreamDispatcherHostTest, EnumerateVideoDevicesNoAccess) {
   SetupFakeUI(false);
   stream_ui_->SetCameraAccess(false);
   EnumerateDevicesAndWaitForResult(kRenderId, kPageRequestId,
                                    MEDIA_DEVICE_VIDEO_CAPTURE);
   EXPECT_TRUE(DoesNotContainLabels(host_->enumerated_devices_));
 }
 
 };  // namespace content