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

components/gcm_driver/fake_gcm_app_handler.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 COMPONENTS_GCM_DRIVER_FAKE_GCM_APP_HANDLER_H_
 #define COMPONENTS_GCM_DRIVER_FAKE_GCM_APP_HANDLER_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
@@ skipping 23 matching lines @@
   const std::string& acked_message_id() const { return acked_message_id_; }
   const IncomingMessage& message() const { return message_; }
   const GCMClient::SendErrorDetails& send_error_details() const {
     return send_error_details_;
   }
 
   void WaitForNotification();
 
   // GCMAppHandler implementation.
   void ShutdownHandler() override;
+  void OnStoreReset() override;
   void OnMessage(const std::string& app_id,
                  const IncomingMessage& message) override;
   void OnMessagesDeleted(const std::string& app_id) override;
   void OnSendError(
       const std::string& app_id,
       const GCMClient::SendErrorDetails& send_error_details) override;
   void OnSendAcknowledged(const std::string& app_id,
                           const std::string& message_id) override;
 
  private:
   void ClearResults();
 
   std::unique_ptr<base::RunLoop> run_loop_;
 
   Event received_event_;
   std::string app_id_;
   std::string acked_message_id_;
   IncomingMessage message_;
   GCMClient::SendErrorDetails send_error_details_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeGCMAppHandler);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_FAKE_GCM_APP_HANDLER_H_