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

chrome/browser/profiles/profile.cc

Index: chrome/browser/profiles/profile.cc
diff --git a/chrome/browser/profiles/profile.cc b/chrome/browser/profiles/profile.cc
index 488ca6e72485b4bdd41b538143e1373ba3ac72f8..7d3a5bf9e129324bd638265137799b54f0c4662b 100644
--- a/chrome/browser/profiles/profile.cc
+++ b/chrome/browser/profiles/profile.cc
@@ -112,7 +112,6 @@ void Profile::RegisterUserPrefs(PrefService* prefs) {
   // in user's profile for other platforms as well.
   prefs->RegisterStringPref(prefs::kApplicationLocale, "");
   prefs->RegisterStringPref(prefs::kApplicationLocaleBackup, "");
-  prefs->RegisterStringPref(prefs::kApplicationLocaleOverride, "");
   prefs->RegisterStringPref(prefs::kApplicationLocaleAccepted, "");
 #endif
 }
@@ -606,8 +605,7 @@ class OffTheRecordProfileImpl : public Profile,
   }
 
 #if defined(OS_CHROMEOS)
-  virtual void ChangeApplicationLocale(
-      const std::string& locale, bool keep_local) {
+  virtual void ChangeApplicationLocale(const std::string& locale) {
   }
 #endif  // defined(OS_CHROMEOS)