Remove render process and WebContents notifications from background printing.

chrome/browser/task_manager/tab_contents_resource_provider.cc

 // Copyright 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/task_manager/tab_contents_resource_provider.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/devtools/devtools_window.h"
 #include "chrome/browser/extensions/extension_service.h"
@@ skipping 231 matching lines @@
     const InstantService* instant_service =
         InstantServiceFactory::GetForProfile(profiles[i]);
     if (instant_service && instant_service->GetNTPContents())
       Add(instant_service->GetNTPContents());
   }
 
 #if defined(ENABLE_FULL_PRINTING)
   // Add all the pages being background printed.
   printing::BackgroundPrintingManager* printing_manager =
       g_browser_process->background_printing_manager();
-  for (printing::BackgroundPrintingManager::WebContentsSet::iterator i =
-           printing_manager->begin();
-       i != printing_manager->end(); ++i) {
+  std::set<content::WebContents*> printing_contents =
+      printing_manager->CurrentContentSet();
+  for (std::set<content::WebContents*>::iterator i =
+           printing_contents.begin();
+       i != printing_contents.end(); ++i) {
     Add(*i);
   }
 #endif
 
   // Then we register for notifications to get new web contents.
   registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_CONNECTED,
                  content::NotificationService::AllBrowserContextsAndSources());
   registrar_.Add(this, content::NOTIFICATION_RENDER_VIEW_HOST_CHANGED,
                  content::NotificationService::AllBrowserContextsAndSources());
   registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_DISCONNECTED,
@@ skipping 94 matching lines @@
     case content::NOTIFICATION_WEB_CONTENTS_DISCONNECTED:
       Remove(web_contents);
       break;
     default:
       NOTREACHED() << "Unexpected notification.";
       return;
   }
 }
 
 }  // namespace task_manager