Reland fix for thumbnail generation.

chrome/browser/ui/exclusive_access/fullscreen_controller.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 "chrome/browser/ui/exclusive_access/fullscreen_controller.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 75 matching lines @@
 bool FullscreenController::IsControllerInitiatedFullscreen() const {
   return toggled_into_fullscreen_;
 }
 
 bool FullscreenController::IsUserAcceptedFullscreen() const {
   return tab_fullscreen_accepted_;
 }
 
 bool FullscreenController::IsFullscreenForTabOrPending(
     const WebContents* web_contents) const {
+  if (IsFullscreenForCapturedTab(web_contents))
+    return true;
   if (web_contents == exclusive_access_tab()) {
     DCHECK(web_contents ==
            exclusive_access_manager()->context()->GetActiveWebContents());
-    DCHECK(web_contents->GetCapturerCount() == 0);
     return true;
   }
-  return IsFullscreenForCapturedTab(web_contents);
+  return false;
 }
 
 bool FullscreenController::IsFullscreenCausedByTab() const {
   return state_prior_to_tab_fullscreen_ == STATE_NORMAL;
 }
 
 void FullscreenController::EnterFullscreenModeForTab(WebContents* web_contents,
                                                      const GURL& origin) {
   DCHECK(web_contents);
 
@@ skipping 484 matching lines @@
     return fullscreened_origin_;
 
   return exclusive_access_tab()->GetLastCommittedURL();
 }
 
 GURL FullscreenController::GetEmbeddingOrigin() const {
   DCHECK(exclusive_access_tab());
 
   return exclusive_access_tab()->GetLastCommittedURL();
 }