Implement reportValidity()

Source/core/html/HTMLFormControlElement.h

Index: Source/core/html/HTMLFormControlElement.h
diff --git a/Source/core/html/HTMLFormControlElement.h b/Source/core/html/HTMLFormControlElement.h
index f56ab7ee0d8a84523b2a5a02aeb2bc81b736e474..71a669bda4c38078e52eccf47b7597e7dabe1583 100644
--- a/Source/core/html/HTMLFormControlElement.h
+++ b/Source/core/html/HTMLFormControlElement.h
@@ -90,7 +90,10 @@ public:
 
     void updateVisibleValidationMessage();
     void hideVisibleValidationMessage();
-    bool checkValidity(WillBeHeapVector<RefPtrWillBeMember<FormAssociatedElement> >* unhandledInvalidControls = 0, CheckValidityEventBehavior = CheckValidityDispatchInvalidEvent);
+    bool checkValidity(WillBeHeapVector<RefPtrWillBeMember<HTMLFormControlElement> >* unhandledInvalidControls = 0, CheckValidityEventBehavior = CheckValidityDispatchInvalidEvent);
+    bool reportValidity();
+    // This must be called only after the caller check the element is focusable.
+    void showValidationMessage();
     // This must be called when a validation constraint or control value is changed.
     void setNeedsValidityCheck();
     virtual void setCustomValidity(const String&) override final;