If user profile doesn't contain language setting, default to his Google account settings.

chrome/browser/profiles/off_the_record_profile_impl.h

Index: chrome/browser/profiles/off_the_record_profile_impl.h
diff --git a/chrome/browser/profiles/off_the_record_profile_impl.h b/chrome/browser/profiles/off_the_record_profile_impl.h
index 85fced7b7bcf2ecbddea7169a233771ba074572a..4d5b563ddb58db6c8aba0cbb693fabf6137a1ba0 100644
--- a/chrome/browser/profiles/off_the_record_profile_impl.h
+++ b/chrome/browser/profiles/off_the_record_profile_impl.h
@@ -69,10 +69,12 @@ class OffTheRecordProfileImpl : public Profile {
 #if defined(OS_CHROMEOS)
   virtual void SetupChromeOSEnterpriseExtensionObserver() OVERRIDE;
   virtual void InitChromeOSPreferences() OVERRIDE;
-
+  virtual void MarkCreated() OVERRIDE;
   virtual void ChangeAppLocale(const std::string& locale,
                                AppLocaleChangedVia) OVERRIDE;
   virtual void OnLogin() OVERRIDE;
+  virtual void RespectLocalePreference() OVERRIDE;
+  virtual void SetGPlusProfileLocale(const std::string&) OVERRIDE;
 #endif  // defined(OS_CHROMEOS)
 
   virtual PrefProxyConfigTracker* GetProxyConfigTracker() OVERRIDE;