Replace manual conversions with Mojo type mappings

services/video_capture/mock_device_test.cc

Index: services/video_capture/mock_device_test.cc
diff --git a/services/video_capture/mock_device_test.cc b/services/video_capture/mock_device_test.cc
index 889a280e1347af9dda1b7f41e4baf0105d5b8780..da18ddc732384c42d147cf09da8dbcdff32b845d 100644
--- a/services/video_capture/mock_device_test.cc
+++ b/services/video_capture/mock_device_test.cc
@@ -9,8 +9,7 @@ namespace video_capture {
 MockDeviceTest::MockDeviceTest()
     : shell::test::ServiceTest("exe:video_capture_unittests") {}
 
-MockDeviceTest::~MockDeviceTest() =
-    default;
+MockDeviceTest::~MockDeviceTest() = default;
 
 void MockDeviceTest::SetUp() {
   ServiceTest::SetUp();
@@ -20,26 +19,24 @@ void MockDeviceTest::SetUp() {
   // 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";
+  media::VideoCaptureDeviceDescriptor mock_descriptor;
+  mock_descriptor.device_id = "MockDeviceId";
   ASSERT_TRUE(service_->AddDeviceToMockFactory(std::move(mock_device_proxy_),
-                                               mock_descriptor->Clone()));
+                                               mock_descriptor));
 
   // Obtain the mock device from the factory
   factory_->CreateDeviceProxy(
-      mock_descriptor->Clone(), mojo::GetProxy(&device_proxy_),
+      mock_descriptor, mojo::GetProxy(&device_proxy_),
       base::Bind([](mojom::DeviceAccessResultCode result_code) {}));
 
   // Start the mock device with arbitrary requested settings
   gfx::Size requested_size(800, 600);
-  requested_settings_ = mojom::VideoCaptureSettings::New();
-  requested_settings_->format = mojom::VideoCaptureFormat::New();
-  requested_settings_->format->frame_size = requested_size;
-  requested_settings_->format->frame_rate = 15;
-  requested_settings_->resolution_change_policy =
-      mojom::ResolutionChangePolicy::FIXED_RESOLUTION;
-  requested_settings_->power_line_frequency =
-      mojom::PowerLineFrequency::DEFAULT;
+  requested_settings_.requested_format.frame_size = requested_size;
+  requested_settings_.requested_format.frame_rate = 15;
+  requested_settings_.resolution_change_policy =
+      media::RESOLUTION_POLICY_FIXED_RESOLUTION;
+  requested_settings_.power_line_frequency =
+      media::PowerLineFrequency::FREQUENCY_DEFAULT;
 
   mock_receiver_ = base::MakeUnique<MockVideoFrameReceiver>(
       mojo::GetProxy(&mock_receiver_proxy_));