Rename ExceptionCode constants to use the names in the spec (2/3)

Source/core/html/HTMLDialogElement.cpp

Index: Source/core/html/HTMLDialogElement.cpp
diff --git a/Source/core/html/HTMLDialogElement.cpp b/Source/core/html/HTMLDialogElement.cpp
index 431099e99a9054d136f346f33c1f22a7a39557f3..869ec2a90255e2f1c65140ef29e2e6a1ac2f02ab 100644
--- a/Source/core/html/HTMLDialogElement.cpp
+++ b/Source/core/html/HTMLDialogElement.cpp
@@ -58,7 +58,7 @@ PassRefPtr<HTMLDialogElement> HTMLDialogElement::create(const QualifiedName& tag
 void HTMLDialogElement::close(ExceptionCode& ec)
 {
     if (!fastHasAttribute(openAttr)) {
-        ec = INVALID_STATE_ERR;
+        ec = InvalidStateError;
         return;
     }
     setBooleanAttribute(openAttr, false);
@@ -111,7 +111,7 @@ void HTMLDialogElement::show()
 void HTMLDialogElement::showModal(ExceptionCode& ec)
 {
     if (fastHasAttribute(openAttr) || !inDocument()) {
-        ec = INVALID_STATE_ERR;
+        ec = InvalidStateError;
         return;
     }
     document()->addToTopLayer(this);