Add command line overrides for GCM checkin URL & MCS endpoint

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 "base/time/time.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"
 #include "url/gurl.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:
   typedef std::map<std::string, std::string> SettingsMap;
 
   // Minimum periodic checkin interval in seconds.
   static const base::TimeDelta MinimumCheckinInterval();
 
-  // Default checkin URL.
-  static const GURL DefaultCheckinURL();
-
   // Calculates digest of provided settings.
   static std::string CalculateDigest(const SettingsMap& settings);
 
   GServicesSettings();
   ~GServicesSettings();
 
   // Updates the settings based on |checkin_response|.
   bool UpdateFromCheckinResponse(
       const checkin_proto::AndroidCheckinResponse& checkin_response);
 
   // Updates the settings based on |load_result|. Returns true if update was
   // successful, false otherwise.
   void UpdateFromLoadResult(const GCMStore::LoadResult& load_result);
 
   SettingsMap settings_map() const { return settings_; }
 
   std::string digest() const { return digest_; }
 
   // Gets the interval at which device should perform a checkin.
   base::TimeDelta GetCheckinInterval() const;
 
   // Gets the URL to use when checking in.
   GURL GetCheckinURL() const;
 
   // Gets address of main MCS endpoint.
   GURL GetMCSMainEndpoint() const;
 
-  // Gets address of fallback MCS endpoint.
+  // Gets address of fallback MCS endpoint. Will be empty if there isn't one.
   GURL GetMCSFallbackEndpoint() const;
 
   // Gets the URL to use when registering or unregistering the apps.
   GURL GetRegistrationURL() const;
 
  private:
   // Digest (hash) of the settings, used to check whether settings need update.
   // It is meant to be sent with checkin request, instead of sending the whole
   // settings table.
   std::string digest_;
 
   // G-services settings as provided by checkin response.
   SettingsMap settings_;
 
   // 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_