Remove a part of type checking predicates of HTMLInputElement.

Source/core/page/EventHandler.cpp

Index: Source/core/page/EventHandler.cpp
diff --git a/Source/core/page/EventHandler.cpp b/Source/core/page/EventHandler.cpp
index b95b1f66f6fd24317f10be61ab00b92a7e0cd369..8aa13a37349ccc9df8cfd1a77e280f12a1f8f469 100644
--- a/Source/core/page/EventHandler.cpp
+++ b/Source/core/page/EventHandler.cpp
@@ -30,6 +30,7 @@
 
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "core/HTMLNames.h"
+#include "core/InputTypeNames.h"
 #include "core/SVGNames.h"
 #include "core/clipboard/DataObject.h"
 #include "core/clipboard/DataTransfer.h"
@@ -975,7 +976,7 @@ static LocalFrame* subframeForHitTestResult(const MouseEventWithHitTestResults&
 
 static bool isSubmitImage(Node* node)
 {
-    return isHTMLInputElement(node) && toHTMLInputElement(node)->isImageButton();
+    return isHTMLInputElement(node) && toHTMLInputElement(node)->type() == InputTypeNames::image;
 }
 
 bool EventHandler::useHandCursor(Node* node, bool isOverLink)