Rename all existing custom element classes as V0

third_party/WebKit/Source/build/scripts/templates/ElementFactory.cpp.tmpl

Index: third_party/WebKit/Source/build/scripts/templates/ElementFactory.cpp.tmpl
diff --git a/third_party/WebKit/Source/build/scripts/templates/ElementFactory.cpp.tmpl b/third_party/WebKit/Source/build/scripts/templates/ElementFactory.cpp.tmpl
index c6cafb9c9c777d1fa01c233293a846271708b142..d9715a1e575fde344ff0aeb56a84700117251489 100644
--- a/third_party/WebKit/Source/build/scripts/templates/ElementFactory.cpp.tmpl
+++ b/third_party/WebKit/Source/build/scripts/templates/ElementFactory.cpp.tmpl
@@ -10,8 +10,8 @@
 {% if fallback_interface %}
 #include "core/{{namespace|lower}}/{{fallback_interface}}.h"
 {% endif %}
-#include "core/dom/custom/CustomElement.h"
-#include "core/dom/custom/CustomElementRegistrationContext.h"
+#include "core/dom/custom/V0CustomElement.h"
+#include "core/dom/custom/V0CustomElementRegistrationContext.h"
 #include "core/dom/Document.h"
 #include "core/frame/Settings.h"
 #include "platform/RuntimeEnabledFeatures.h"
@@ -86,7 +86,7 @@ static void create{{namespace}}FunctionMap()
     if (ConstructorFunction function = g_constructors->get(localName))
         return function(document, {% if namespace == 'HTML' %}formElement, {% endif %}createdByParser);
 
-    if (document.registrationContext() && CustomElement::isValidName(localName)) {
+    if (document.registrationContext() && V0CustomElement::isValidName(localName)) {
         Element* element = document.registrationContext()->createCustomTagElement(document, QualifiedName(nullAtom, localName, {{namespace_prefix}}NamespaceURI));
         ASSERT_WITH_SECURITY_IMPLICATION(element->is{{namespace}}Element());
         return to{{namespace}}Element(element);