Fixed readPixels not working in Dartium.

tools/dom/scripts/htmlrenamer.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.
 import logging
 import monitored
 import re
 
 typed_array_renames = {
     'ArrayBuffer': 'ByteBuffer',
@@ skipping 388 matching lines @@
   'UIEvent.initUIEvent',
   'UIEvent.layerX',
   'UIEvent.layerY',
   'UIEvent.pageX',
   'UIEvent.pageY',
   'UIEvent.which',
   'KeyboardEvent.charCode',
   'KeyboardEvent.keyCode',
   'KeyboardEvent.which',
 
+  'WebGLRenderingContext.readPixels',
+  'WebGL2RenderingContext.readPixels',  
   'WheelEvent.initWebKitWheelEvent',
   'WheelEvent.deltaX',
   'WheelEvent.deltaY',
   'WorkerGlobalScope.webkitNotifications',
   'Window.getComputedStyle',
   'Window.clearInterval',
   'Window.clearTimeout',
   # TODO(tll): These have been converted from int to double in Chrome 39 for
   #            subpixel precision.  Special case for backward compatibility.
   'Window.scrollX',
@@ skipping 682 matching lines @@
 
     # We're looking for a sequence of letters which start with capital letter
     # then a series of caps and finishes with either the end of the string or
     # a capital letter.
     # The [0-9] check is for names such as 2D or 3D
     # The following test cases should match as:
     #   WebKitCSSFilterValue: WebKit(C)(SS)(F)ilterValue
     #   XPathNSResolver: (X)()(P)ath(N)(S)(R)esolver (no change)
     #   IFrameElement: (I)()(F)rameElement (no change)
     return re.sub(r'([A-Z])([A-Z]{2,})([A-Z]|$)', toLower, name)