Fix the issue where checking a form for :valid/:invalid would trigger invalid events for its elemen…

Source/core/html/HTMLFormControlElement.cpp

Index: Source/core/html/HTMLFormControlElement.cpp
diff --git a/Source/core/html/HTMLFormControlElement.cpp b/Source/core/html/HTMLFormControlElement.cpp
index 3526e51947edbc61ba26f5b8826b2fe9d2bd844c..3e00ea14785dac1f90e5f43cb3a5300a158c9d50 100644
--- a/Source/core/html/HTMLFormControlElement.cpp
+++ b/Source/core/html/HTMLFormControlElement.cpp
@@ -486,10 +486,13 @@ ValidationMessageClient* HTMLFormControlElement::validationMessageClient() const
     return &page->validationMessageClient();
 }
 
-bool HTMLFormControlElement::checkValidity(WillBeHeapVector<RefPtrWillBeMember<FormAssociatedElement> >* unhandledInvalidControls)
+bool HTMLFormControlElement::checkValidity(WillBeHeapVector<RefPtrWillBeMember<FormAssociatedElement> >* unhandledInvalidControls, DispatchInvalidEvent dispatchInvalidEvent)
 {
     if (!willValidate() || isValidElement())
         return true;
+    ASSERT(dispatchInvalidEvent != DispatchInvalidEventUnknown);
+    if (dispatchInvalidEvent != DispatchInvalidEventEnabled)
+        return false;
     // An event handler can deref this object.
     RefPtrWillBeRawPtr<HTMLFormControlElement> protector(this);
     RefPtrWillBeRawPtr<Document> originalDocument(document());