cros: Defer lockscreen updateUserImage and loadUser calls.

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

Index: chrome/browser/ui/webui/chromeos/login/base_webui_handler.h
diff --git a/chrome/browser/ui/webui/chromeos/login/base_webui_handler.h b/chrome/browser/ui/webui/chromeos/login/base_webui_handler.h
index aae5b269e1ac9c7a598b71e195e7301d163eef9b..9d8c121ff71232b9de124f037a1318f8bcf74d5a 100644
--- a/chrome/browser/ui/webui/chromeos/login/base_webui_handler.h
+++ b/chrome/browser/ui/webui/chromeos/login/base_webui_handler.h
@@ -40,7 +40,7 @@ class JSCallsContainer {
   ~JSCallsContainer();
 
   // Used to decide whether the JS call should be deferred.
-  bool is_initialized() { return is_initialized_; }
+  bool is_initialized() const { return is_initialized_; }
 
   // Used to mark the instance as intialized.
   void mark_initialized() { is_initialized_ = true; }
@@ -225,6 +225,12 @@ class BaseWebUIHandler : 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.
   //