Add support for [NoInterfaceObject] extended attribute to bindings generator

Source/modules/inputmethod/InputMethodContext.idl

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 12 matching lines @@
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 // http://www.w3.org/TR/ime-api/
 [
+    NoInterfaceObject,
     ImplementationLacksVTable
 ] interface InputMethodContext {
     readonly attribute Composition composition;
     attribute boolean enabled;
     readonly attribute DOMString locale;
 
     void confirmComposition();
     void setCaretRectangle(Node anchor, long x, long y, long w, long h);
     void setExclusionRectangle(Node anchor, long x, long y, long w, long h);
     boolean open();
 };