Revert 244074 "Eliminate video capture thread in renderer"

trunk/src/content/renderer/media/rtc_video_capture_delegate.cc

Index: trunk/src/content/renderer/media/rtc_video_capture_delegate.cc
===================================================================
--- trunk/src/content/renderer/media/rtc_video_capture_delegate.cc	(revision 244357)
+++ trunk/src/content/renderer/media/rtc_video_capture_delegate.cc	(working copy)
@@ -5,27 +5,25 @@
 #include "content/renderer/media/rtc_video_capture_delegate.h"
 
 #include "base/bind.h"
-#include "base/location.h"
-#include "content/renderer/media/video_capture_impl_manager.h"
-#include "content/renderer/render_thread_impl.h"
 #include "media/base/video_frame.h"
 
 namespace content {
 
 RtcVideoCaptureDelegate::RtcVideoCaptureDelegate(
-    const media::VideoCaptureSessionId id)
+    const media::VideoCaptureSessionId id,
+    VideoCaptureImplManager* vc_manager)
     : session_id_(id),
+      vc_manager_(vc_manager),
+      capture_engine_(NULL),
       got_first_frame_(false),
       error_occured_(false) {
   DVLOG(3) << " RtcVideoCaptureDelegate::ctor";
-  capture_engine_ =
-      RenderThreadImpl::current()->video_capture_impl_manager()
-         ->UseDevice(session_id_);
+  capture_engine_ = vc_manager_->AddDevice(session_id_, this);
 }
 
 RtcVideoCaptureDelegate::~RtcVideoCaptureDelegate() {
   DVLOG(3) << " RtcVideoCaptureDelegate::dtor";
-  StopCapture();
+  vc_manager_->RemoveDevice(session_id_, this);
 }
 
 void RtcVideoCaptureDelegate::StartCapture(