Adding "Clear hosted app data" checkbox to browsing data removal UI.

chrome/browser/ui/webui/options2/clear_browser_data_handler2.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_WEBUI_OPTIONS2_CLEAR_BROWSER_DATA_HANDLER2_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS2_CLEAR_BROWSER_DATA_HANDLER2_H_
 #pragma once
 
 #include "chrome/browser/browsing_data_remover.h"
 #include "chrome/browser/prefs/pref_member.h"
@@ skipping 15 matching lines @@
   // WebUIMessageHandler implementation.
   virtual void RegisterMessages() OVERRIDE;
 
  private:
   // Javascript callback to start clearing data.
   void HandleClearBrowserData(const ListValue* value);
 
   // Callback from BrowsingDataRemover. Closes the dialog.
   virtual void OnBrowsingDataRemoverDone() OVERRIDE;
 
+  // Clears the data of hosted apps, which is usually protected from deletion

[markusheintz_, 2012/06/04 14:50:52]

nit: Does "usually" mean:
A) always protected
B) sometimes protected and sometimes not.

In case of A please delete "usually"
In case of B please document when it is protected and when not. 

[Mike West, 2012/06/05 08:55:02]

Changed to "otherwise", which I think makes things more clear. The data is
protected from deletion, unless Clear Hosted App Data is called.

+  // when the user clears regular browsing data.
+  void HandleClearHostedAppData();
+
   // If non-null it means removal is in progress. BrowsingDataRemover takes care
   // of deleting itself when done.
   BrowsingDataRemover* remover_;
 
   // Keeps track of whether clearing LSO data is supported.
   BooleanPrefMember clear_plugin_lso_data_enabled_;
 
+  // Indicates that we also need to delete hosted app data after finishing the
+  // first removal operation.
+  bool remove_hosted_app_data_pending_;
+
   DISALLOW_COPY_AND_ASSIGN(ClearBrowserDataHandler);
 };
 
 }  // namespace options2
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS2_CLEAR_BROWSER_DATA_HANDLER2_H_