Highlight background pages in task manager if user clicks View Background Pages.

chrome/browser/ui/cocoa/browser_window_cocoa.mm

 // Copyright (c) 2011 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/cocoa/browser_window_cocoa.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/mac/mac_util.h"
@@ skipping 292 matching lines @@
 views::Window* BrowserWindowCocoa::ShowAboutChromeDialog() {
   NOTIMPLEMENTED();
   return NULL;
 }
 
 void BrowserWindowCocoa::ShowUpdateChromeDialog() {
   restart_browser::RequestRestart(nil);
 }
 
 void BrowserWindowCocoa::ShowTaskManager() {
-  TaskManagerMac::Show();
+  TaskManagerMac::Show(false);
+}
+
+void BrowserWindowCocoa::ShowBackgroundPages() {
+  TaskManagerMac::Show(true);
 }
 
 void BrowserWindowCocoa::ShowBookmarkBubble(const GURL& url,
                                             bool already_bookmarked) {
   [controller_ showBookmarkBubbleForURL:url
                       alreadyBookmarked:(already_bookmarked ? YES : NO)];
 }
 
 bool BrowserWindowCocoa::IsDownloadShelfVisible() const {
   return [controller_ isDownloadShelfVisible] != NO;
@@ skipping 311 matching lines @@
 
 NSWindow* BrowserWindowCocoa::window() const {
   return [controller_ window];
 }
 
 void BrowserWindowCocoa::UpdateSidebarForContents(TabContents* tab_contents) {
   if (tab_contents == browser_->GetSelectedTabContents()) {
     [controller_ updateSidebarForContents:tab_contents];
   }
 }