[Mojo Video Capture] Use actual factory instances implementing media::VideoCaptureDeviceFactory

services/video_capture/device_mock_to_media_adapter.cc

 // Copyright 2016 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 "services/video_capture/device_mock_to_media_adapter.h"
 
 #include "services/video_capture/device_client_media_to_mojo_adapter.h"
 
 namespace video_capture {
 
 DeviceMockToMediaAdapter::DeviceMockToMediaAdapter(
-    mojom::MockVideoCaptureDevicePtr device)
-    : device_(std::move(device)) {}
+    mojom::MockVideoCaptureDevicePtr* device)
+    : device_(device) {}
 
 DeviceMockToMediaAdapter::~DeviceMockToMediaAdapter() = default;
 
 void DeviceMockToMediaAdapter::AllocateAndStart(
     const media::VideoCaptureParams& params,
     std::unique_ptr<Client> client) {
   mojom::MockDeviceClientPtr client_proxy;
   auto client_request = mojo::GetProxy(&client_proxy);
 
   mojo::MakeStrongBinding(
       base::MakeUnique<DeviceClientMediaToMojoAdapter>(std::move(client)),
       std::move(client_request));
 
-  device_->AllocateAndStart(std::move(client_proxy));
+  (*device_)->AllocateAndStart(std::move(client_proxy));
 }
 
 void DeviceMockToMediaAdapter::RequestRefreshFrame() {}
 
 void DeviceMockToMediaAdapter::StopAndDeAllocate() {
-  device_->StopAndDeAllocate();
+  (*device_)->StopAndDeAllocate();
 }
 
 void DeviceMockToMediaAdapter::GetPhotoCapabilities(
     GetPhotoCapabilitiesCallback callback) {}
 
 void DeviceMockToMediaAdapter::SetPhotoOptions(
     media::mojom::PhotoSettingsPtr settings,
     SetPhotoOptionsCallback callback) {}
 
 void DeviceMockToMediaAdapter::TakePhoto(TakePhotoCallback callback) {}
 
 }  // namespace video_capture