Update idl files in third_party/WebCore

dom/Document.idl

Index: dom/Document.idl
diff --git a/dom/Document.idl b/dom/Document.idl
index 4d4e9fb49526a88511a8c742f1bb64740b7391ac..a4f053c90162c4cd1017fa6e56471d7ed33a3f83 100644
--- a/dom/Document.idl
+++ b/dom/Document.idl
@@ -262,6 +262,10 @@
 
     [Conditional=CSS_REGIONS, V8EnabledAtRuntime=cssRegions] DOMNamedFlowCollection webkitGetNamedFlows();
 
+#if defined(LANGUAGE_JAVASCRIPT) && LANGUAGE_JAVASCRIPT
+    [Conditional=FONT_LOAD_EVENTS, V8EnabledAtRuntime=fontLoadEvents] readonly attribute FontLoader fontloader;
+#endif
+
 #if !defined(LANGUAGE_OBJECTIVE_C) || !LANGUAGE_OBJECTIVE_C
     // Event handler DOM attributes
     [NotEnumerable] attribute EventListener onabort;
@@ -356,6 +360,14 @@
         raises (DOMException);
 #endif
 
+#if defined(ENABLE_CUSTOM_ELEMENTS) && ENABLE_CUSTOM_ELEMENTS
+    [V8EnabledAtRuntime=customDOMElements, Conditional=CUSTOM_ELEMENTS, ImplementedAs=registerElement, CallWith=ScriptState]
+    CustomElementConstructor webkitRegister(in DOMString name, in [Optional] Dictionary options) raises(DOMException);
+    [ReturnNewObject] Element createElement(in DOMString localName, in [TreatNullAs=NullString] DOMString typeExtension) raises (DOMException);
+    [ReturnNewObject] Element createElementNS(in [TreatNullAs=NullString] DOMString namespaceURI, in DOMString qualifiedName,
+                                              in [TreatNullAs=NullString] DOMString typeExtension) raises (DOMException);
+#endif
+
 #if defined(LANGUAGE_CPP) && LANGUAGE_CPP
     // Extra WebCore methods exposed to allow compile-time casting in C++
     boolean isHTMLDocument();