[Mojo Video Capture] Add content_browsertest for exercising video capture

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 1499 matching lines @@
                                           &state)) {
         request->devices.push_back(device_info);
         request->SetState(device_info.device.type, state);
         DVLOG(1) << "HandleAccessRequestResponse - device already opened "
                  << ", {label = " << label << "}"
                  << ", device_id = " << device.id << "}";
         continue;
       }
     }
     device_info.session_id =
-        GetDeviceManager(device_info.device.type)->Open(device_info);
+        GetDeviceManager(device_info.device.type)->Open(device_info.device);
     TranslateDeviceIdToSourceId(request, &device_info.device);
     request->devices.push_back(device_info);
 
     request->SetState(device_info.device.type, MEDIA_REQUEST_STATE_OPENING);
     DVLOG(1) << "HandleAccessRequestResponse - opening device "
              << ", {label = " << label <<  "}"
              << ", {device_id = " << device_info.device.id << "}"
              << ", {session_id = " << device_info.session_id << "}";
   }
 
@@ skipping 28 matching lines @@
   CancelRequest(label);
 }
 
 void MediaStreamManager::WillDestroyCurrentMessageLoop() {
   DVLOG(3) << "MediaStreamManager::WillDestroyCurrentMessageLoop()";
   DCHECK(CalledOnIOThread());
   DCHECK(requests_.empty());
   if (media_devices_manager_)
     media_devices_manager_->StopMonitoring();
   if (video_capture_manager_)
-    video_capture_manager_->UnregisterListener();
+    video_capture_manager_->UnregisterListener(this);
   if (audio_input_device_manager_)
-    audio_input_device_manager_->UnregisterListener();
+    audio_input_device_manager_->UnregisterListener(this);
 
   device_task_runner_ = nullptr;
   audio_input_device_manager_ = nullptr;
   video_capture_manager_ = nullptr;
   media_devices_manager_ = nullptr;
   g_media_stream_manager_tls_ptr.Pointer()->Set(nullptr);
 }
 
 void MediaStreamManager::NotifyDevicesChanged(
     MediaDeviceType device_type,
@@ skipping 186 matching lines @@
     return devices;
 
   for (auto& device : devices) {
     device.camera_calibration =
         video_capture_manager()->GetCameraCalibration(device.id);
   }
   return devices;
 }
 
 }  // namespace content