[GCM] Reset store on checkin rejection and add checkin state to internals

components/gcm_driver/gcm_internals_constants.cc

 // Copyright 2015 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_internals_constants.h"
 
 namespace gcm_driver {
 
 // Resource paths.
 const char kGcmInternalsCSS[] = "gcm_internals.css";
 const char kGcmInternalsJS[] = "gcm_internals.js";
 
 // Message handlers.
 const char kGetGcmInternalsInfo[] = "getGcmInternalsInfo";
 const char kSetGcmInternalsInfo[] = "gcmInternals.setGcmInternalsInfo";
 const char kSetGcmInternalsRecording[] = "setGcmInternalsRecording";
 
 // GCM internal info.
 const char kAndroidId[] = "androidId";
 const char kCheckinInfo[] = "checkinInfo";
 const char kConnectionClientCreated[] = "connectionClientCreated";
 const char kConnectionInfo[] = "connectionInfo";
 const char kConnectionState[] = "connectionState";
 const char kDeviceInfo[] = "deviceInfo";
 const char kGcmClientCreated[] = "gcmClientCreated";
 const char kGcmClientState[] = "gcmClientState";
 const char kGcmEnabled[] = "gcmEnabled";
 const char kIsRecording[] = "isRecording";
+const char kLastCheckin[] = "lastCheckin";
+const char kNextCheckin[] = "nextCheckin";
 const char kProfileServiceCreated[] = "profileServiceCreated";
 const char kReceiveInfo[] = "receiveInfo";
 const char kRegisteredAppIds[] = "registeredAppIds";
 const char kRegistrationInfo[] = "registrationInfo";
 const char kResendQueueSize[] = "resendQueueSize";
 const char kSendInfo[] = "sendInfo";
 const char kSendQueueSize[] = "sendQueueSize";
 const char kDecryptionFailureInfo[] = "decryptionFailureInfo";
 
 }  // namespace gcm_driver