Deprecate MouseEvent.elementTo and elementFrom since they have the same

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 844 matching lines @@
 
   def ShouldSuppressMember(self, interface, member, member_prefix=''):
     """ Returns true if the member should be suppressed."""
     if self._FindMatch(interface, member, member_prefix, removed_html_members):
       return True
     if interface.id in _removed_html_interfaces:
       return True
     metadata_member = member
     if member_prefix == 'on:':
       metadata_member = 'on' + metadata_member.lower()
-    if self._metadata.IsDeprecated(interface, metadata_member):
+    if self._metadata.IsSuppressed(interface, metadata_member):
       return True
     return False
 
   def ShouldSuppressInterface(self, interface):
     """ Returns true if the interface should be suppressed."""
     if interface.id in _removed_html_interfaces:
       return True
 
   def _FindMatch(self, interface, member, member_prefix, candidates):
     def find_match(interface_id):
@@ skipping 106 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)