[Mojo Video Capture] Hook up video capture service behind a feature flag

content/browser/renderer_host/media/media_stream_manager.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 "content/browser/renderer_host/media/media_stream_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 15 matching lines @@
 #include "base/threading/thread.h"
 #include "base/threading/thread_local.h"
 #include "build/build_config.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/renderer_host/media/audio_input_device_manager.h"
 #include "content/browser/renderer_host/media/in_process_video_capture_provider.h"
 #include "content/browser/renderer_host/media/media_capture_devices_impl.h"
 #include "content/browser/renderer_host/media/media_devices_manager.h"
 #include "content/browser/renderer_host/media/media_stream_requester.h"
 #include "content/browser/renderer_host/media/media_stream_ui_proxy.h"
+#include "content/browser/renderer_host/media/service_video_capture_provider.h"
 #include "content/browser/renderer_host/media/video_capture_manager.h"
+#include "content/browser/renderer_host/media/video_capture_provider_switcher.h"
 #include "content/browser/renderer_host/render_process_host_impl.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/desktop_media_id.h"
 #include "content/public/browser/media_observer.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/web_contents_media_capture_id.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/media_stream_request.h"
 #include "crypto/hmac.h"
 #include "media/audio/audio_device_description.h"
 #include "media/audio/audio_system.h"
 #include "media/base/audio_parameters.h"
 #include "media/base/channel_layout.h"
 #include "media/base/media_switches.h"
 #include "media/capture/video/video_capture_device_factory.h"
 #include "media/capture/video/video_capture_system_impl.h"
+#include "services/video_capture/public/cpp/constants.h"
 #include "url/gurl.h"
 #include "url/origin.h"
 
 #if defined(OS_WIN)
 #include "base/win/scoped_com_initializer.h"
 #endif
 
 #if defined(OS_CHROMEOS)
 #include "chromeos/audio/cras_audio_handler.h"
 #endif
@@ skipping 351 matching lines @@
     // buggy third party Direct Show modules, http://crbug.com/428958.
     video_capture_thread_.init_com_with_mta(false);
     CHECK(video_capture_thread_.Start());
     device_task_runner = video_capture_thread_.task_runner();
 #endif
     video_capture_provider = base::MakeUnique<InProcessVideoCaptureProvider>(
         base::MakeUnique<media::VideoCaptureSystemImpl>(
             media::VideoCaptureDeviceFactory::CreateFactory(
                 BrowserThread::GetTaskRunnerForThread(BrowserThread::UI))),
         std::move(device_task_runner));
+    if (base::FeatureList::IsEnabled(video_capture::kMojoVideoCapture)) {
+      DVLOG(3) << "Mojo video capture enabled";
+      video_capture_provider = base::MakeUnique<VideoCaptureProviderSwitcher>(
+          base::MakeUnique<ServiceVideoCaptureProvider>(),
+          std::move(video_capture_provider));
+    }
   }
   InitializeMaybeAsync(std::move(video_capture_provider));
 
   base::PowerMonitor* power_monitor = base::PowerMonitor::Get();
   // BrowserMainLoop always creates the PowerMonitor instance before creating
   // MediaStreamManager, but power_monitor may be NULL in unit tests.
   if (power_monitor)
     power_monitor->AddObserver(this);
 }
 
@@ skipping 1337 matching lines @@
     request->ui_proxy->OnStarted(
         base::Bind(&MediaStreamManager::StopMediaStreamFromBrowser,
                    base::Unretained(this), label),
         base::Bind(&MediaStreamManager::OnMediaStreamUIWindowId,
                    base::Unretained(this), request->video_type(),
                    request->devices));
   }
 }
 
 }  // namespace content