Remove ENABLE_CUSTOM_ELEMENTS compile time flag

Source/bindings/v8/CustomElementHelpers.h

Index: Source/bindings/v8/CustomElementHelpers.h
diff --git a/Source/bindings/v8/CustomElementHelpers.h b/Source/bindings/v8/CustomElementHelpers.h
index f01cc6905e575612dbe62b8bfce464325e415a4e..556af82782f9afad00b61ea3bd1524dfa4e6b750 100644
--- a/Source/bindings/v8/CustomElementHelpers.h
+++ b/Source/bindings/v8/CustomElementHelpers.h
@@ -45,8 +45,6 @@
 
 namespace WebCore {
 
-#if ENABLE(CUSTOM_ELEMENTS)
-
 class CustomElementConstructor;
 class CustomElementInvocation;
 class Element;
@@ -100,8 +98,6 @@ inline bool CustomElementHelpers::isValidPrototypeParameter(const ScriptValue& v
     return isValidPrototypeParameter(value, state, namespaceURI);
 }
 
-#endif // ENABLE(CUSTOM_ELEMENTS)
-
 } // namespace WebCore
 
 #endif // CustomElementHelpers_h