[GCM] fixing G-settings initialization from an empty store

google_apis/gcm/engine/gservices_settings.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 GOOGLE_APIS_GCM_ENGINE_GSERVICES_SETTINGS_H_
 #define GOOGLE_APIS_GCM_ENGINE_GSERVICES_SETTINGS_H_
 
 #include <map>
 #include <string>
 
 #include "base/memory/weak_ptr.h"
 #include "google_apis/gcm/base/gcm_export.h"
 #include "google_apis/gcm/engine/gcm_store.h"
 #include "google_apis/gcm/protocol/checkin.pb.h"
 
 namespace gcm {
 
 // Class responsible for handling G-services settings. It takes care of
 // extracting them from checkin response and storing in GCMStore.
 class GCM_EXPORT GServicesSettings {
  public:
+  // Minimum periodic checkin interval in seconds.
+  static const int64 kMinimumCheckinInterval;
+
   // Create an instance of GServicesSettings class. |gcm_store| is used to store
   // the settings after they are extracted from checkin response.
   explicit GServicesSettings(GCMStore* gcm_store);
   ~GServicesSettings();
 
   // Udpates the settings based on |checkin_response|.
   void UpdateFromCheckinResponse(
       const checkin_proto::AndroidCheckinResponse& checkin_response);
 
   // Updates the settings based on |load_result|.
@@ skipping 48 matching lines @@
 
   // Factory for creating references in callbacks.
   base::WeakPtrFactory<GServicesSettings> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GServicesSettings);
 };
 
 }  // namespace gcm
 
 #endif  // GOOGLE_APIS_GCM_ENGINE_GSERVICES_SETTINGS_H_