Update WebKit IDLs after chrome roll.

html/HTMLDocument.idl

Index: html/HTMLDocument.idl
diff --git a/html/HTMLDocument.idl b/html/HTMLDocument.idl
index 07427cfeb1825847ee7d2d389e3c8668fd586b44..6f2169d7b6d4862c6fdb906f55a64e7128908d07 100644
--- a/html/HTMLDocument.idl
+++ b/html/HTMLDocument.idl
@@ -23,7 +23,7 @@
     V8CustomToJSObject,
     V8SkipVTableValidation
 ] interface HTMLDocument : Document {
-    [JSCustom, V8Custom] void open();
+    [V8Custom] void open();
     void close();
     [Custom] void write(in [Optional=DefaultIsUndefined] DOMString text);
     [Custom] void writeln(in [Optional=DefaultIsUndefined] DOMString text);
@@ -36,7 +36,7 @@
 
 #if defined(LANGUAGE_JAVASCRIPT) && LANGUAGE_JAVASCRIPT
     // FIXME: This should eventually be available (if they are wanted) for all languages.
-    [JSCustom, Replaceable, Deletable] attribute HTMLAllCollection all;
+    [Replaceable, Deletable] attribute HTMLAllCollection all;
 #endif
 
     void clear();