[Chrome OS] Plumb new error codes from SignedSettings to consumers of the API

chrome/browser/chromeos/proxy_config_service_impl.h

 // Copyright (c) 2010 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 CHROME_BROWSER_CHROMEOS_PROXY_CONFIG_SERVICE_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_PROXY_CONFIG_SERVICE_IMPL_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 172 matching lines @@
   bool UISetProxyConfigToDirect();
   bool UISetProxyConfigToAutoDetect();
   bool UISetProxyConfigToPACScript(const GURL& pac_url);
   bool UISetProxyConfigToSingleProxy(const net::ProxyServer& server);
   bool UISetProxyConfigToProxyPerScheme(const std::string& scheme,
                                         const net::ProxyServer& server);
   // Only valid for MODE_SINGLE_PROXY or MODE_PROXY_PER_SCHEME.
   bool UISetProxyConfigBypassRules(const net::ProxyBypassRules& bypass_rules);
 
   // Implementation for SignedSettings::Delegate
-  virtual void OnSettingsOpSucceeded(bool value);
-  virtual void OnSettingsOpSucceeded(std::string value);
-  virtual void OnSettingsOpFailed(SignedSettings::FailureCode code);
+  virtual void OnSettingsOpCompleted(SignedSettings::ReturnCode code,
+                                     std::string value);
+  virtual void OnSettingsOpCompleted(SignedSettings::ReturnCode code,
+                                     bool value);
 
  private:
   friend class base::RefCountedThreadSafe<ProxyConfigServiceImpl>;
 
   // Init proxy to default config, i.e. AutoDetect.
   // If |post_to_io_thread| is true, a task will be posted to IO thread to
   // update |cached_config|.
   void InitConfigToDefault(bool post_to_io_thread);
 
   // Persists proxy config to device.
@@ skipping 43 matching lines @@
   // respectively.
   scoped_refptr<SignedSettings> retrieve_property_op_;
   scoped_refptr<SignedSettings> store_property_op_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyConfigServiceImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_PROXY_CONFIG_SERVICE_IMPL_H_