Stop using nested message loop for alert() and other JS dialogs

chrome/browser/ui/browser.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_BROWSER_H_
 #define CHROME_BROWSER_UI_BROWSER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 493 matching lines @@
   void ShowFirstRunBubble();
 
   ExclusiveAccessManager* exclusive_access_manager() {
     return exclusive_access_manager_.get();
   }
 
   extensions::WindowController* extension_window_controller() const {
     return extension_window_controller_.get();
   }
 
+  bool ShouldRunUnloadListenerBeforeClosing(content::WebContents* web_contents);
+  bool RunUnloadListenerBeforeClosing(content::WebContents* web_contents);
+
  private:
   friend class BrowserTest;
   friend class FullscreenControllerInteractiveTest;
   friend class FullscreenControllerTest;
   FRIEND_TEST_ALL_PREFIXES(AppModeTest, EnableAppModeTest);
   FRIEND_TEST_ALL_PREFIXES(BrowserCommandControllerTest,
                            IsReservedCommandOrKeyIsApp);
   FRIEND_TEST_ALL_PREFIXES(BrowserCommandControllerTest, AppFullScreen);
   FRIEND_TEST_ALL_PREFIXES(BrowserTest, NoTabsInPopups);
   FRIEND_TEST_ALL_PREFIXES(BrowserTest, ConvertTabToAppShortcut);
@@ skipping 484 matching lines @@
   // The following factory is used for chrome update coalescing.
   base::WeakPtrFactory<Browser> chrome_updater_factory_;
 
   // The following factory is used to close the frame at a later time.
   base::WeakPtrFactory<Browser> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_H_