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

chrome/browser/extensions/extension_gcm_app_handler.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_gcm_app_handler.h"
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 50 matching lines @@
        ++extension) {
     if (IsGCMPermissionEnabled(extension->get()))
       GetGCMDriver()->RemoveAppHandler((*extension)->id());
   }
 }
 
 void ExtensionGCMAppHandler::ShutdownHandler() {
   js_event_router_.reset();
 }
 
+void ExtensionGCMAppHandler::OnStoreReset() {
+  // TODO(crbug.com/661660): Notify the extension somehow that its registration
+  // was invalidated and deleted?
+}
+
 void ExtensionGCMAppHandler::OnMessage(const std::string& app_id,
                                        const gcm::IncomingMessage& message) {
   js_event_router_->OnMessage(app_id, message);
 }
 
 void ExtensionGCMAppHandler::OnMessagesDeleted(const std::string& app_id) {
   js_event_router_->OnMessagesDeleted(app_id);
 }
 
 void ExtensionGCMAppHandler::OnSendError(
@@ skipping 112 matching lines @@
 
 void ExtensionGCMAppHandler::AddAppHandler(const std::string& app_id) {
   GetGCMDriver()->AddAppHandler(app_id, this);
 }
 
 void ExtensionGCMAppHandler::RemoveAppHandler(const std::string& app_id) {
   GetGCMDriver()->RemoveAppHandler(app_id);
 }
 
 }  // namespace extensions