Do not use local override for language settings: always sync.

chrome/browser/profiles/profile.h

 // Copyright (c) 2011 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.
 
 // This class gathers state related to a single user profile.
 
 #ifndef CHROME_BROWSER_PROFILES_PROFILE_H_
 #define CHROME_BROWSER_PROFILES_PROFILE_H_
 #pragma once
 
@@ skipping 467 matching lines @@
   // Returns the IO-thread-accessible profile data for this profile.
   virtual ExtensionInfoMap* GetExtensionInfoMap() = 0;
 
   // Returns the PromoCounter for Instant, or NULL if not applicable.
   virtual PromoCounter* GetInstantPromoCounter() = 0;
 
   // Gets the policy context associated with this profile.
   virtual policy::ProfilePolicyContext* GetPolicyContext() = 0;
 
 #if defined(OS_CHROMEOS)
   // Changes application locale.

[Nikita (slow), 2011/01/25 16:04:44]

Please add cases when it's called. I was confused that method is called on every
locale change.

[Denis Lagno, 2011/01/26 10:31:40]

reasonable concern.
I've made this method to be called on every language change for a profile.

-  // "Keep local" means that changes should not be propagated to other devices.
-  virtual void ChangeApplicationLocale(
-      const std::string& locale, bool keep_local) = 0;
+  virtual void ChangeApplicationLocale(const std::string& locale) = 0;
 
   // Returns ChromeOS's ProxyConfigServiceImpl, creating if not yet created.
   virtual chromeos::ProxyConfigServiceImpl*
       GetChromeOSProxyConfigServiceImpl() = 0;
 
   // Creates ChromeOS's EnterpriseExtensionListener.
   virtual void SetupChromeOSEnterpriseExtensionObserver() = 0;
 
 #endif  // defined(OS_CHROMEOS)
 
@@ skipping 50 matching lines @@
   bool restored_last_session_;
 
   // Accessibility events will only be propagated when the pause
   // level is zero.  PauseAccessibilityEvents and ResumeAccessibilityEvents
   // increment and decrement the level, respectively, rather than set it to
   // true or false, so that calls can be nested.
   int accessibility_pause_level_;
 };
 
 #endif  // CHROME_BROWSER_PROFILES_PROFILE_H_