[Mojo Video Capture] Simplify API and some cleanups

services/video_capture/mock_device_video_capture_service_test.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/mock_device_video_capture_service_test.h"
-
-namespace video_capture {
-
-MockDeviceVideoCaptureServiceTest::MockDeviceVideoCaptureServiceTest()
-    : service_manager::test::ServiceTest("exe:video_capture_unittests") {}
-
-MockDeviceVideoCaptureServiceTest::~MockDeviceVideoCaptureServiceTest() =
-    default;
-
-void MockDeviceVideoCaptureServiceTest::SetUp() {
-  ServiceTest::SetUp();
-  connector()->ConnectToInterface("service:video_capture", &service_);
-  service_->ConnectToMockDeviceFactory(mojo::GetProxy(&factory_));
-
-  // Set up a mock device and add it to the factory
-  mock_device_ = base::MakeUnique<MockVideoCaptureDeviceImpl>(
-      mojo::GetProxy(&mock_device_proxy_));
-  auto mock_descriptor = mojom::VideoCaptureDeviceDescriptor::New();
-  mock_descriptor->device_id = "MockDeviceId";
-  ASSERT_TRUE(service_->AddDeviceToMockFactory(std::move(mock_device_proxy_),
-                                               mock_descriptor->Clone()));
-
-  // Obtain the mock device from the factory
-  factory_->CreateDeviceProxy(
-      mock_descriptor->Clone(), mojo::GetProxy(&device_proxy_),
-      base::Bind([](mojom::DeviceAccessResultCode result_code) {}));
-
-  requested_format_.frame_size = gfx::Size(800, 600);
-  requested_format_.frame_rate = 15;
-  requested_format_.pixel_format = media::PIXEL_FORMAT_I420;
-  requested_format_.pixel_storage = media::PIXEL_STORAGE_CPU;
-  mock_receiver_ = base::MakeUnique<MockVideoFrameReceiver>(
-      mojo::GetProxy(&mock_receiver_proxy_));
-}
-
-}  // namespace video_capture