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

components/gcm_driver/gcm_client.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_GCM_CLIENT_H_
 #define COMPONENTS_GCM_DRIVER_GCM_CLIENT_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 194 matching lines @@
     // Called when activities are being recorded and a new activity has just
     // been recorded.
     virtual void OnActivityRecorded() = 0;
 
     // Called when a new connection is established and a successful handshake
     // has been performed.
     virtual void OnConnected(const net::IPEndPoint& ip_endpoint) = 0;
 
     // Called when the connection is interrupted.
     virtual void OnDisconnected() = 0;
+
+    // Called when the GCM store is reset (e.g. due to corruption), which
+    // changes the device ID, invalidating all prior registrations.
+    virtual void OnStoreReset() = 0;
   };
 
   GCMClient();
   virtual ~GCMClient();
 
   // Begins initialization of the GCM Client. This will not trigger a
   // connection.
   // |chrome_build_info|: chrome info, i.e., version, channel and etc.
   // |store_path|: path to the GCM store.
   // |blocking_task_runner|: for running blocking file tasks.
@@ skipping 99 matching lines @@
   // to be set, and allows that component to later revoke the setting. It should
   // be unique.
   virtual void AddHeartbeatInterval(const std::string& scope,
                                     int interval_ms) = 0;
   virtual void RemoveHeartbeatInterval(const std::string& scope) = 0;
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_CLIENT_H_