Fix DaemonControllerLinux::SetConfigAndStart() to reload config automatically.

remoting/host/plugin/daemon_controller_mac.cc

 // Copyright (c) 2012 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 "remoting/host/plugin/daemon_controller.h"
 
 #include <launch.h>
 #include <stdio.h>
 #include <sys/types.h>
 
@@ skipping 210 matching lines @@
 
 void DaemonControllerMac::DoUpdateConfig(
     scoped_ptr<base::DictionaryValue> config,
     const CompletionCallback& done_callback) {
   FilePath config_file_path(kHostConfigFilePath);
   JsonHostConfig config_file(config_file_path);
   if (!config_file.Read()) {
     done_callback.Run(RESULT_FAILED);
     return;
   }
-  for (DictionaryValue::key_iterator key(config->begin_keys());
-       key != config->end_keys(); ++key) {
-    std::string value;
-    if (!config->GetString(*key, &value)) {
-      LOG(ERROR) << *key << " is not a string.";
-      done_callback.Run(RESULT_FAILED);
-      return;
-    }
-    config_file.SetString(*key, value);
+  if (!config_file.CopyFrom(config.Get())) {
+    LOG(ERROR) << "Failed to update configuration.";
+    done_callback.Run(RESULT_FAILED);
+    return;
   }
 
   std::string config_data = config_file.GetSerializedData();
   ShowPreferencePane(config_data, done_callback);
 }
 
 void DaemonControllerMac::ShowPreferencePane(
     const std::string& config_data, const CompletionCallback& done_callback) {
   if (DoShowPreferencePane(config_data)) {
     RegisterForPreferencePaneNotifications(done_callback);
@@ skipping 114 matching lines @@
   }
 }
 
 }  // namespace
 
 scoped_ptr<DaemonController> remoting::DaemonController::Create() {
   return scoped_ptr<DaemonController>(new DaemonControllerMac());
 }
 
 }  // namespace remoting