[protector] Added UI for invalid Preferences backup case.

chrome/browser/ui/browser_init.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_INIT_H_
 #define CHROME_BROWSER_UI_BROWSER_INIT_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 230 matching lines @@
     // Shows a sync promo dialog if necessary. When called |browser| should be
     // the browser that's being used for startup. On return |browser| is set
     // to the browser spawned from the sync promo dialog (if any). On input
     // |tabs| should be the set of tabs to show on startup.  On return |tabs|
     // will contain the new set of tabs to show on startup. Returns the index
     // of the tab to activate.
     size_t ShowSyncPromoDialog(bool process_startup,
                                Browser** browser,
                                std::vector<Tab>* tabs);
 
+    // Checks whether the Preferences backup is invalid and notifies user in
+    // that case.
+    void CheckPreferencesBackup(Profile* profile);
+
     const FilePath cur_dir_;
     const CommandLine& command_line_;
     Profile* profile_;
     BrowserInit* browser_init_;
     bool is_first_run_;
     DISALLOW_COPY_AND_ASSIGN(LaunchWithProfile);
   };
 
  private:
   friend class CloudPrintProxyPolicyTest;
@@ skipping 30 matching lines @@
 
   // True if we have already read and reset the preference kWasRestarted. (A
   // member variable instead of a static variable inside WasRestarted because
   // of testing.)
   static bool was_restarted_read_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserInit);
 };
 
 #endif  // CHROME_BROWSER_UI_BROWSER_INIT_H_