Tab (and AuraWindow) Capture: Capture refresh frame after Resume()

content/browser/media/capture/aura_window_capture_machine.cc

 // Copyright 2013 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 "content/browser/media/capture/aura_window_capture_machine.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/logging.h"
@@ skipping 99 matching lines @@
 void AuraWindowCaptureMachine::Resume() {
   BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
                           base::Bind(&AuraWindowCaptureMachine::InternalResume,
                                      base::Unretained(this)));
 }
 
 void AuraWindowCaptureMachine::InternalResume() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DVLOG(1) << "Resuming frame capture and delivery.";
   frame_capture_active_ = true;
+  // Whenever capture resumes, capture a refresh frame immediately to make sure
+  // no content updates are missing from the video stream.
+  MaybeCaptureForRefresh();
 }
 
 void AuraWindowCaptureMachine::Stop(const base::Closure& callback) {
   // Stops the capture machine asynchronously.
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE, base::Bind(
           &AuraWindowCaptureMachine::InternalStop,
           base::Unretained(this),
           callback));
 }
@@ skipping 307 matching lines @@
     Capture(timestamp);
 }
 
 void AuraWindowCaptureMachine::OnCompositingShuttingDown(
     ui::Compositor* compositor) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   compositor->RemoveAnimationObserver(this);
 }
 
 }  // namespace content