Begin adding support for tab mirroring via the MediaStream audio/video capturing

content/browser/renderer_host/media/video_capture_controller_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.
 
 // Unit test for VideoCaptureController.
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
@@ skipping 83 matching lines @@
   scoped_refptr<VideoCaptureController> controller_;
   MessageLoop* message_loop_;
   VideoCaptureControllerID controller_id_;
   base::ProcessHandle process_handle_;
 };
 
 class MockVideoCaptureManager
     : public media_stream::VideoCaptureManager {
  public:
   MockVideoCaptureManager()
-      : video_session_id_(kStartOpenSessionId) {}
+      : VideoCaptureManager(
+            content::MEDIA_STREAM_DEVICE_TYPE_USER_VIDEO_CAPTURE),
+        video_session_id_(kStartOpenSessionId) {}
 
   void Init() {
     device_name_.unique_id = "/dev/video0";
     device_name_.device_name = "fake_device_0";
 
     video_capture_device_.reset(
         media::FakeVideoCaptureDevice::Create(device_name_));
     ASSERT_TRUE(video_capture_device_.get() != NULL);
   }
 
@@ skipping 146 matching lines @@
   message_loop_->PostDelayedTask(
       FROM_HERE, MessageLoop::QuitClosure(), base::TimeDelta::FromSeconds(1));
   message_loop_->Run();
 
   EXPECT_CALL(*vcm_,
               StopCapture(vcm_->video_session_id_))
       .Times(1);
   controller_->StopCapture(controller_handler_->controller_id_,
                            controller_handler_.get());
 }