Add MessageEvent.data template for dart2js, remove duplicate claims on ClipboardEvent and PointerEv…

tools/dom/scripts/generator.py

 #!/usr/bin/python
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """This module provides shared functionality for systems to generate
 Dart APIs from the IDL database."""
 
 import copy
 import json
@@ skipping 123 matching lines @@
     'CSSStyleDeclaration':
         #                    IE                   Firefox
         'CSSStyleDeclaration,MSStyleCSSProperties,CSS2Properties',
 
     'Clipboard': 'Clipboard,DataTransfer',
 
     'ApplicationCache':
         'ApplicationCache,DOMApplicationCache,OfflineResourceList',
 
     'Event':
-        'Event,InputEvent,ClipboardEvent',
+        'Event,InputEvent',
 
     'HTMLTableCellElement':
         'HTMLTableCellElement,HTMLTableDataCellElement,HTMLTableHeaderCellElement',
 
     'GainNode': 'GainNode,AudioGainNode',
 
     'IDBOpenDBRequest':
         'IDBOpenDBRequest,IDBVersionChangeRequest',
 
-    'MouseEvent': 'MouseEvent,DragEvent,PointerEvent,MSPointerEvent',
+    'MouseEvent': 'MouseEvent,DragEvent',
 
     'MutationObserver': 'MutationObserver,WebKitMutationObserver',
 
     'NamedNodeMap': 'NamedNodeMap,MozNamedAttrMap',
 
     'NodeList': 'NodeList,RadioNodeList',
 
     'OscillatorNode': 'OscillatorNode,Oscillator',
 
     'PannerNode': 'PannerNode,AudioPannerNode,webkitAudioPannerNode',
@@ skipping 1337 matching lines @@
             return_type == 'Rectangle')
 
 def wrap_return_type_blink(return_type, type_name, type_registry):
     """Returns True if we should wrap the returned value. This checks
     a number of different variations, calling the more basic functions
     above."""
     return (wrap_unwrap_type_blink(return_type, type_registry) or
             wrap_unwrap_type_blink(type_name, type_registry) or
             wrap_type_blink(return_type, type_registry) or
             wrap_unwrap_list_blink(return_type, type_registry))