Reland CL to implement browser-side logging to WebRtc log.

content/browser/renderer_host/media/web_contents_video_capture_device.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.
 //
 // Implementation notes: This needs to work on a variety of hardware
 // configurations where the speed of the CPU and GPU greatly affect overall
 // performance. Spanning several threads, the process of capturing has been
 // split up into four conceptual stages:
 //
 //   1. Reserve Buffer: Before a frame can be captured, a slot in the client's
@@ skipping 682 matching lines @@
   DVLOG(1) << "WebContents::FromRenderViewHost(" << rvh << ") returned NULL.";
   return false;
 }
 
 void WebContentsCaptureMachine::WebContentsDestroyed(
     WebContents* web_contents) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   subscription_.reset();
   web_contents->DecrementCapturerCount();
-  oracle_proxy_->ReportError();
+  oracle_proxy_->ReportError("WebContentsDestroyed()");
 }
 
 RenderWidgetHost* WebContentsCaptureMachine::GetTarget() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (!web_contents())
     return NULL;
 
   RenderWidgetHost* rwh = NULL;
   if (fullscreen_widget_id_ != MSG_ROUTING_NONE) {
     RenderProcessHost* process = web_contents()->GetRenderProcessHost();
@@ skipping 92 matching lines @@
     scoped_ptr<Client> client) {
   DVLOG(1) << "Allocating " << params.requested_format.frame_size.ToString();
   impl_->AllocateAndStart(params, client.Pass());
 }
 
 void WebContentsVideoCaptureDevice::StopAndDeAllocate() {
   impl_->StopAndDeAllocate();
 }
 
 }  // namespace content