Update error badge on wrench menu button

chrome/browser/ui/global_error_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_GLOBAL_ERROR_SERVICE_H_
 #define CHROME_BROWSER_UI_GLOBAL_ERROR_SERVICE_H_
 #pragma once
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "chrome/browser/profiles/profile_keyed_service.h"
 
 class GlobalError;
+class Profile;
 
 // This service manages a list of errors that are meant to be shown globally.
 // If an error applies to an entire profile and not just to a tab then the
 // error should be shown using this service. Examples of global errors are:
 //   - the previous session crashed for a given profile.
 //   - a sync error occurred
 class GlobalErrorService : public ProfileKeyedService {
  public:
-  GlobalErrorService();
+  // Constructs a GlobalErrorService object for the given profile. The profile
+  // maybe NULL for tests.
+  explicit GlobalErrorService(Profile* profile);
   virtual ~GlobalErrorService();
 
   // Adds the given error to the list of global errors and displays it on
   // browswer windows. If no browser windows are open  then the error is
   // displayed once a browser window is opened. This class takes ownership of
   // the error.
   void AddGlobalError(GlobalError* error);
 
   // Hides the given error and removes it from the list of global errors. Caller
   // then takes ownership of the error and is responsible for deleting it.
   void RemoveGlobalError(GlobalError* error);
 
   // Gets the error with the given command ID or NULL if no such error exists.
   // This class maintains ownership of the returned error.
   GlobalError* GetGlobalErrorByMenuItemCommandID(int command_id) const;
 
   // Gets the badge icon resource ID for the first error with a badge.
   // Returns 0 if no such error exists.
   int GetFirstBadgeResourceID() const;
 
   // Gets the first error that has a bubble view which hasn't been shown yet.
   // Returns NULL if no such error exists.
   GlobalError* GetFirstGlobalErrorWithBubbleView() const;
 
   // Gets all errors.
   const std::vector<GlobalError*>& errors() { return errors_; }
 
+  // Post a notification that a global error has changed and that the error UI
+  // should update it self. Pass NULL for the given error to mean all error UIs
+  // should update.
+  void NotifyErrorsChanged(GlobalError* error);
+
  private:
   std::vector<GlobalError*> errors_;
+  Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(GlobalErrorService);
 };
 
 #endif  // CHROME_BROWSER_UI_GLOBAL_ERROR_SERVICE_H_