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

chrome/browser/push_messaging/push_messaging_service_impl.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_SERVICE_IMPL_H_
 #define CHROME_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_SERVICE_IMPL_H_
 
 #include <stdint.h>
 #include <memory>
 #include <set>
@@ skipping 48 matching lines @@
                                  public BackgroundTrigger {
  public:
   // If any Service Workers are using push, starts GCM and adds an app handler.
   static void InitializeForProfile(Profile* profile);
 
   explicit PushMessagingServiceImpl(Profile* profile);
   ~PushMessagingServiceImpl() override;
 
   // gcm::GCMAppHandler implementation.
   void ShutdownHandler() override;
+  void OnStoreReset() override;
   void OnMessage(const std::string& app_id,
                  const gcm::IncomingMessage& message) override;
   void OnMessagesDeleted(const std::string& app_id) override;
   void OnSendError(
       const std::string& app_id,
       const gcm::GCMClient::SendErrorDetails& send_error_details) override;
   void OnSendAcknowledged(const std::string& app_id,
                           const std::string& message_id) override;
   bool CanHandle(const std::string& app_id) const override;
 
@@ skipping 194 matching lines @@
   // we can finish processing them without being interrupted.
   std::unique_ptr<ScopedKeepAlive> in_flight_keep_alive_;
 #endif
 
   base::WeakPtrFactory<PushMessagingServiceImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PushMessagingServiceImpl);
 };
 
 #endif  // CHROME_BROWSER_PUSH_MESSAGING_PUSH_MESSAGING_SERVICE_IMPL_H_