[GCM] Remove all persisted data and close connections when signing out of a profile

google_apis/gcm/engine/mcs_client.h

 // Copyright 2013 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 GOOGLE_APIS_GCM_ENGINE_MCS_CLIENT_H_
 #define GOOGLE_APIS_GCM_ENGINE_MCS_CLIENT_H_
 
 #include <deque>
 #include <map>
 #include <string>
@@ skipping 105 matching lines @@
   // Whether to use RMQ depends on whether the protobuf has |ttl| set or not.
   // |ttl == 0| denotes the message should only be sent if the connection is
   // open. |ttl > 0| will keep the message saved for |ttl| seconds, after which
   // it will be dropped if it was unable to be sent. When a message is dropped,
   // |message_sent_callback_| is invoked with a TTL expiration error.
   virtual void SendMessage(const MCSMessage& message);
 
   // Disconnects the client and permanently destroys the persistent GCM store.
   // WARNING: This is permanent, and the client must be recreated with new
   // credentials afterwards.
+  // TODO(jianli): destroying the persistent GCM store should be moved to
+  // GCMClient.
   void Destroy();
 
   // Returns the current state of the client.
   State state() const { return state_; }
 
  protected:
   // Sets a |gcm_store| for testing. Does not take ownership.
   // TODO(fgorski): Remove this method. Create GCMEngineFactory that will create
   // components of the engine.
   void SetGCMStoreForTesting(GCMStore* gcm_store);
@@ skipping 118 matching lines @@
   HeartbeatManager heartbeat_manager_;
 
   base::WeakPtrFactory<MCSClient> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MCSClient);
 };
 
 } // namespace gcm
 
 #endif  // GOOGLE_APIS_GCM_ENGINE_MCS_CLIENT_H_