Enumerate the return value of dispatchEvent so it is clear.

third_party/WebKit/Source/core/html/HTMLFormControlElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLFormControlElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLFormControlElement.cpp b/third_party/WebKit/Source/core/html/HTMLFormControlElement.cpp
index 06c7f3153e7485af8302066a1d9a3e7c590a8d2d..49e836cf69b03d9792957baab428a2afdf7e00fa 100644
--- a/third_party/WebKit/Source/core/html/HTMLFormControlElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLFormControlElement.cpp
@@ -539,8 +539,8 @@ bool HTMLFormControlElement::checkValidity(WillBeHeapVector<RefPtrWillBeMember<H
     // An event handler can deref this object.
     RefPtrWillBeRawPtr<HTMLFormControlElement> protector(this);
     RefPtrWillBeRawPtr<Document> originalDocument(document());
-    bool needsDefaultAction = dispatchEvent(Event::createCancelable(EventTypeNames::invalid));
-    if (needsDefaultAction && unhandledInvalidControls && inDocument() && originalDocument == document())
+    DispatchEventResult eventResult = dispatchEvent(Event::createCancelable(EventTypeNames::invalid));

[philipj_slow, 2016/02/25 15:23:46]

I think dispatchResult would be a better short name in places like this. Or
dispatchEventResult for maximum line length.

[dtapuska, 2016/02/25 22:06:10]

Done.

+    if (eventResult == DispatchEventResult::NotCanceled && unhandledInvalidControls && inDocument() && originalDocument == document())
         unhandledInvalidControls->append(this);
     return false;
 }