Fix WebrtcVideoStream to handle failed capture requests.

remoting/host/desktop_session_proxy.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 "remoting/host/desktop_session_proxy.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 230 matching lines @@
 
   desktop_channel_.reset();
   desktop_session_id_ = UINT32_MAX;
 
   shared_buffers_.clear();
 
   // Generate fake responses to keep the video capturer in sync.
   while (pending_capture_frame_requests_) {
     --pending_capture_frame_requests_;
     video_capturer_->OnCaptureResult(
-        webrtc::DesktopCapturer::Result::ERROR_PERMANENT, nullptr);
+        webrtc::DesktopCapturer::Result::ERROR_TEMPORARY, nullptr);
   }
 }
 
 void DesktopSessionProxy::SetAudioCapturer(
     const base::WeakPtr<IpcAudioCapturer>& audio_capturer) {
   DCHECK(audio_capture_task_runner_->BelongsToCurrentThread());
 
   audio_capturer_ = audio_capturer;
 }
 
 void DesktopSessionProxy::CaptureFrame() {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 
   if (desktop_channel_) {
     ++pending_capture_frame_requests_;
     SendToDesktop(new ChromotingNetworkDesktopMsg_CaptureFrame());
   } else {
     video_capturer_->OnCaptureResult(
-        webrtc::DesktopCapturer::Result::ERROR_PERMANENT, nullptr);
+        webrtc::DesktopCapturer::Result::ERROR_TEMPORARY, nullptr);
   }
 }
 
 void DesktopSessionProxy::SetVideoCapturer(
     const base::WeakPtr<IpcVideoFrameCapturer> video_capturer) {
   DCHECK(caller_task_runner_->BelongsToCurrentThread());
 
   video_capturer_ = video_capturer;
 }
 
@@ skipping 246 matching lines @@
 }
 
 // static
 void DesktopSessionProxyTraits::Destruct(
     const DesktopSessionProxy* desktop_session_proxy) {
   desktop_session_proxy->caller_task_runner_->DeleteSoon(FROM_HERE,
                                                          desktop_session_proxy);
 }
 
 }  // namespace remoting