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

components/gcm_driver/gcm_client_impl_unittest.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 "components/gcm_driver/gcm_client_impl.h"
 
 #include <stdint.h>
 
 #include <initializer_list>
 #include <memory>
@@ skipping 298 matching lines @@
   void OnMessageSendError(
       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;
   void OnGCMReady(const std::vector<AccountMapping>& account_mappings,
                   const base::Time& last_token_fetch_time) override;
   void OnActivityRecorded() override {}
   void OnConnected(const net::IPEndPoint& ip_endpoint) override {}
   void OnDisconnected() override {}
+  void OnStoreReset() override {}
 
   GCMClientImpl* gcm_client() const { return gcm_client_.get(); }
   GCMClientImpl::State gcm_client_state() const {
     return gcm_client_->state_;
   }
   FakeMCSClient* mcs_client() const {
     return reinterpret_cast<FakeMCSClient*>(gcm_client_->mcs_client_.get());
   }
   ConnectionFactory* connection_factory() const {
     return gcm_client_->connection_factory_.get();
@@ skipping 1544 matching lines @@
   ReceiveMessageFromMCS(message);
 
   EXPECT_EQ(MESSAGE_RECEIVED, last_event());
   EXPECT_EQ(kExtensionAppId, last_app_id());
   EXPECT_EQ(expected_data.size(), last_message().data.size());
   EXPECT_EQ(expected_data, last_message().data);
   EXPECT_EQ(kSender, last_message().sender_id);
 }
 
 }  // namespace gcm