Refactor video capturing code in the render process

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 8122735227b8f1b7e02b6f2f6aeb2dc88e00969e..19fb7d0f35be1b818f3d9dee1051f5470acff5ee 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -362,7 +362,7 @@ void RenderThreadImpl::Init() {
   db_message_filter_ = new DBMessageFilter();
   AddFilter(db_message_filter_.get());
 
-  vc_manager_.reset(new VideoCaptureImplManager());
+  vc_manager_ = new VideoCaptureImplManager();
   AddFilter(vc_manager_->video_capture_message_filter());
 
 #if defined(ENABLE_WEBRTC)
@@ -528,7 +528,7 @@ void RenderThreadImpl::Shutdown() {
   media_stream_factory_.reset();
 #endif
   RemoveFilter(vc_manager_->video_capture_message_filter());
-  vc_manager_.reset();
+  vc_manager_ = NULL;
 
   RemoveFilter(db_message_filter_.get());
   db_message_filter_ = NULL;