cros: Defer lockscreen updateUserImage and loadUser calls.

chrome/browser/ui/webui/chromeos/login/base_screen_handler.h

Index: chrome/browser/ui/webui/chromeos/login/base_screen_handler.h
diff --git a/chrome/browser/ui/webui/chromeos/login/base_screen_handler.h b/chrome/browser/ui/webui/chromeos/login/base_screen_handler.h
index 1fae31a4972d59e3a75e8a7f498ce2d661f266f7..4b6e5d5ab955d1f64e24423d979ee6462356d0ec 100644
--- a/chrome/browser/ui/webui/chromeos/login/base_screen_handler.h
+++ b/chrome/browser/ui/webui/chromeos/login/base_screen_handler.h
@@ -220,6 +220,12 @@ class BaseScreenHandler : public content::WebUIMessageHandler,
 
   void SetBaseScreen(BaseScreen* base_screen);
 
+  // Returns true if JS side has sent a screenStateInitialize event.
+  // TODO(jdufault): Remove after resolving crbug.com/699798
+  bool is_js_initialized_and_ready() const {
+    return js_calls_container_->is_initialized();
+  }
+
  private:
   // Calls Javascript method.
   //