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

chromecast/common/chromecast_config.cc

 // 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.
 
 #include "chromecast/common/chromecast_config.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
@@ skipping 120 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   if (pref_service_->IsUserModifiablePreference(key.c_str())) {
     VLOG(1) << "Set config: key=" << key << ", value=" << value;
     pref_service_->SetInteger(key.c_str(), value);
   } else {
     LOG(ERROR) << "Cannot set read-only config: key=" << key
                << ", value=" << value;
   }
 }
 
+bool ChromecastConfig::HasValue(const std::string& key) const {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  return pref_service_->HasPrefPath(key.c_str());
+}
+
 }  // namespace chromecast