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

Source/core/dom/CustomElementRegistry.cpp

Index: Source/core/dom/CustomElementRegistry.cpp
diff --git a/Source/core/dom/CustomElementRegistry.cpp b/Source/core/dom/CustomElementRegistry.cpp
index 8bdbf8fbf4d4981a32c9f7a76171402380e4b7f5..fd08e2135bc58ec26b69ab791ca31d117ac75cad 100644
--- a/Source/core/dom/CustomElementRegistry.cpp
+++ b/Source/core/dom/CustomElementRegistry.cpp
@@ -97,19 +97,19 @@ void CustomElementRegistry::registerElement(CustomElementConstructorBuilder* con
     }
 
     if (!constructorBuilder->validateOptions()) {
-        ec = INVALID_STATE_ERR;
+        ec = InvalidStateError;
         return;
     }
 
     QualifiedName tagName = nullQName();
     if (!constructorBuilder->findTagName(type, tagName)) {
-        ec = NAMESPACE_ERR;
+        ec = NamespaceError;
         return;
     }
     ASSERT(tagName.namespaceURI() == HTMLNames::xhtmlNamespaceURI || tagName.namespaceURI() == SVGNames::svgNamespaceURI);
 
     if (m_definitions.contains(type)) {
-        ec = INVALID_STATE_ERR;
+        ec = InvalidStateError;
         return;
     }
 
@@ -118,7 +118,7 @@ void CustomElementRegistry::registerElement(CustomElementConstructorBuilder* con
     // Consulting the constructor builder could execute script and
     // kill the document.
     if (!document()) {
-        ec = INVALID_STATE_ERR;
+        ec = InvalidStateError;
         return;
     }