Notify GCMAppHandlers when the store is reset, so they clear cached IDs

chrome/browser/push_messaging/push_messaging_app_identifier.h

 // Copyright 2014 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_PUSH_MESSAGING_PUSH_MESSAGING_APP_IDENTIFIER_H_
 #define CHROME_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_APP_IDENTIFIER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string>
@@ skipping 40 matching lines @@
   // If not found, is_null() will be true.
   static PushMessagingAppIdentifier FindByServiceWorker(
       Profile* profile,
       const GURL& origin,
       int64_t service_worker_registration_id);
 
   // Returns all the PushMessagingAppIdentifiers currently registered for the
   // given |profile|.
   static std::vector<PushMessagingAppIdentifier> GetAll(Profile* profile);
 
+  // Deletes all PushMessagingAppIdentifiers currently registered for the given
+  // |profile|.
+  static void DeleteAllFromPrefs(Profile* profile);
+
   // Returns the number of PushMessagingAppIdentifiers currently registered for
   // the given |profile|.
   static size_t GetCount(Profile* profile);
 
   ~PushMessagingAppIdentifier();
 
   // Persist this app identifier to prefs.
   void PersistToPrefs(Profile* profile) const;
 
   // Delete this app identifier from prefs.
@@ skipping 35 matching lines @@
 
   // Validates that all the fields contain valid values.
   void DCheckValid() const;
 
   std::string app_id_;
   GURL origin_;
   int64_t service_worker_registration_id_;
 };
 
 #endif  // CHROME_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_APP_IDENTIFIER_H_