[WIP]Implement Chromium side changes for navigator.language(s) support for workers.

chrome/browser/browser_process_impl.h

Index: chrome/browser/browser_process_impl.h
diff --git a/chrome/browser/browser_process_impl.h b/chrome/browser/browser_process_impl.h
index 937f813aa3c51c455c6bfe104e2c9f906b4e27e6..fcddf5d7f3b17afc215956ffdfcbd031d32e8f92 100644
--- a/chrome/browser/browser_process_impl.h
+++ b/chrome/browser/browser_process_impl.h
@@ -162,6 +162,7 @@ class BrowserProcessImpl : public BrowserProcess,
   void ApplyAllowCrossOriginAuthPromptPolicy();
   void ApplyDefaultBrowserPolicy();
   void ApplyMetricsReportingPolicy();
+  void OnLanguagesChange();
 
   scoped_ptr<MetricsServicesManager> metrics_services_manager_;
 
@@ -248,6 +249,7 @@ class BrowserProcessImpl : public BrowserProcess,
   // Ensures that the observers of plugin/print disable/enable state
   // notifications are properly added and removed.
   PrefChangeRegistrar pref_change_registrar_;
+  PrefChangeRegistrar local_pref_change_registrar_;
 
   // Lives here so can safely log events on shutdown.
   scoped_ptr<ChromeNetLog> net_log_;