Chromecast: provides a method to check if config has been set by user.

chromecast/common/chromecast_config.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.
 //
 // Chromecast-specific configurations retrieved from and stored into a given
 // configuration file.
 
 #ifndef CHROMECAST_COMMON_CHROMECAST_CONFIG_H_
 #define CHROMECAST_COMMON_CHROMECAST_CONFIG_H_
 
@@ skipping 19 matching lines @@
  public:
   // Creates new singleton instance of ChromecastConfig.
   static void Create(PrefRegistrySimple* registry);
 
   // Returns the singleton instance of ChromecastConfig.
   static ChromecastConfig* GetInstance();
 
   // Saves configs into configuration file.
   void Save() const;
 
-  // Returns string value for key, if present.
+  // Returns string value for |key|, if present.
   const std::string GetValue(const std::string& key) const;
 
-  // Returns integer value for key, if present.
+  // Returns integer value for |key|, if present.
   const int GetIntValue(const std::string& key) const;
 
-  // Sets new string value for key.
+  // Sets new string value for |key|.
   void SetValue(const std::string& key, const std::string& value) const;
 
-  // Sets new int value for key.
+  // Sets new int value for |key|.
   void SetIntValue(const std::string& key, int value) const;
 
+  // Whether or not a value has been set for |key|.
+  bool HasValue(const std::string& key) const;
+
   scoped_refptr<base::SequencedWorkerPool> worker_pool() const {
     return worker_pool_;
   }
 
   PrefService* pref_service() const { return pref_service_.get(); }
 
  private:
   ChromecastConfig();
   ~ChromecastConfig();
 
@@ skipping 11 matching lines @@
   scoped_ptr<PrefService> pref_service_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromecastConfig);
 };
 
 }  // namespace chromecast
 
 #endif  // CHROMECAST_COMMON_CHROMECAST_CONFIG_H_