Pass camera facing info to audio client

content/browser/renderer_host/media/video_capture_manager.cc

Index: content/browser/renderer_host/media/video_capture_manager.cc
diff --git a/content/browser/renderer_host/media/video_capture_manager.cc b/content/browser/renderer_host/media/video_capture_manager.cc
index 007fae8d034143bd019b28d18fa6ea52b26a205f..e778e6e1ca2d0aca6a381d7a9e2eb8cfcc1d798c 100644
--- a/content/browser/renderer_host/media/video_capture_manager.cc
+++ b/content/browser/renderer_host/media/video_capture_manager.cc
@@ -34,6 +34,7 @@
 #include "content/public/common/media_stream_request.h"
 #include "media/base/bind_to_current_loop.h"
 #include "media/base/media_switches.h"
+#include "media/base/video_facing.h"
 #include "media/capture/video/video_capture_buffer_pool_impl.h"
 #include "media/capture/video/video_capture_buffer_tracker_factory_impl.h"
 #include "media/capture/video/video_capture_device.h"
@@ -334,13 +335,19 @@ VideoCaptureManager::VideoCaptureManager(
     std::unique_ptr<media::VideoCaptureDeviceFactory> factory)
     : listener_(nullptr),
       new_capture_session_id_(1),
-      video_capture_device_factory_(std::move(factory)) {}
+      video_capture_device_factory_(std::move(factory)),
+      capture_observer_(NULL) {}
 
 VideoCaptureManager::~VideoCaptureManager() {
   DCHECK(devices_.empty());
   DCHECK(device_start_queue_.empty());
 }
 
+void VideoCaptureManager::SetVideoCaptureObserver(
+    media::VideoCaptureObserver* observer) {
+  capture_observer_ = observer;
+}
+
 void VideoCaptureManager::Register(
     MediaStreamProviderListener* listener,
     const scoped_refptr<base::SingleThreadTaskRunner>& device_task_runner) {
@@ -471,6 +478,11 @@ void VideoCaptureManager::DoStopDevice(DeviceEntry* entry) {
     }
   }
 
+  const DeviceInfo* device_info = GetDeviceInfoById(entry->id);
+  if (device_info != NULL && capture_observer_ != NULL) {
+    capture_observer_->OnVideoCaptureStopped(device_info->descriptor.facing);
+  }
+
   DVLOG(3) << "DoStopDevice. Send stop request for device = " << entry->id
            << " serial_id = " << entry->serial_id << ".";
   entry->video_capture_controller.OnLog(
@@ -649,6 +661,10 @@ VideoCaptureManager::DoStartDeviceCaptureOnDeviceThread(
     return nullptr;
   }
 
+  if (capture_observer_ != NULL) {
+    capture_observer_->OnVideoCaptureStarted(descriptor.facing);
+  }
+
   video_capture_device->AllocateAndStart(params, std::move(device_client));
   return video_capture_device;
 }