ChromeOS: switch UI language before apps are loaded.

chrome/browser/profiles/profile_impl.h

Index: chrome/browser/profiles/profile_impl.h
diff --git a/chrome/browser/profiles/profile_impl.h b/chrome/browser/profiles/profile_impl.h
index 14599cfec92cb79cb4e2af26c85ca935169651d6..7bd809374494c969bb4e96d2326eaae1fcfcb905 100644
--- a/chrome/browser/profiles/profile_impl.h
+++ b/chrome/browser/profiles/profile_impl.h
@@ -137,6 +137,9 @@ class ProfileImpl : public Profile {
   void ChangeAppLocale(const std::string& locale, AppLocaleChangedVia) override;
   void OnLogin() override;
   void InitChromeOSPreferences() override;
+  void SetOnPrefsLoadedHook(
+      const base::Callback<void(Profile*, const base::Closure&)>& callback)
+      override;
 #endif  // defined(OS_CHROMEOS)
 
   PrefProxyConfigTracker* GetProxyConfigTracker() override;
@@ -165,9 +168,12 @@ class ProfileImpl : public Profile {
   // Does final initialization. Should be called after prefs were loaded.
   void DoFinalInit();
 
-  // Does final prefs initialization and calls Init().
+  // Check |success|, |on_prefs_loaded_hook_| and proceed to OnPrefsLoadedImpl.
   void OnPrefsLoaded(bool success);
 
+  // Does final prefs initialization and calls Init().
+  void OnPrefsLoadedImpl();
+
 #if defined(ENABLE_SESSION_SERVICE)
   void StopCreateSessionServiceTimer();
 
@@ -259,6 +265,16 @@ class ProfileImpl : public Profile {
 
   scoped_ptr<PrefProxyConfigTracker> pref_proxy_config_tracker_;
 
+  Profile::Delegate* delegate_;
+
+  chrome_browser_net::Predictor* predictor_;
+
+#if defined(OS_CHROMEOS)
+  // Hook to interrupt profile initialization flow (see
+  // Profile::SetOnPrefsLoadedHook).
+  base::Callback<void(Profile*, const base::Closure&)> on_prefs_loaded_hook_;
+#endif
+
   // STOP!!!! DO NOT ADD ANY MORE ITEMS HERE!!!!
   //
   // Instead, make your Service/Manager/whatever object you're hanging off the
@@ -273,10 +289,6 @@ class ProfileImpl : public Profile {
   // components/keyed_service/core/keyed_service.h
   // components/keyed_service/content/browser_context_keyed_service_factory.*
 
-  Profile::Delegate* delegate_;
-
-  chrome_browser_net::Predictor* predictor_;
-
   DISALLOW_COPY_AND_ASSIGN(ProfileImpl);
 };