Deprecate MouseEvent.elementTo and elementFrom since they have the same

tools/dom/scripts/dartmetadata.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 to provide Dart metadata for
 DOM APIs.
 """
 
 import copy
@@ skipping 629 matching lines @@
     annotations = self.GetMetadata(library_name, interface, member_name)
 
     ann2 = self._GetDart2JSSpecificAnnotations(idl_type, interface.id, member_name)
     if ann2:
       if annotations:
         annotations.extend(ann2)
       else:
         annotations = ann2
     return annotations
 
-  def IsDeprecated(self, interface, member_name):
+  def IsSuppressed(self, interface, member_name):
     annotations = self._GetSupportLevelAnnotations(interface.id, member_name)
     return any(
-        annotation.startswith('@deprecated') for annotation in annotations)
+        annotation.startswith('@removed') for annotation in annotations)
 
   def _GetCommonAnnotations(self, interface, member_name=None,
       source_member_name=None):
     if member_name:
       key = '%s.%s' % (interface.id, member_name)
       dom_name = '%s.%s' % (interface.javascript_binding_name, member_name)
     else:
       key = interface.id
       dom_name = interface.javascript_binding_name
 
@@ skipping 130 matching lines @@
     if dart_action:
       if dart_action == 'unstable':
         annotations.append('@Unstable()')
       elif dart_action == 'experimental':
         if comment:
           annotations.append('// %s' % comment)
         annotations.append('@Experimental() // %s' % support_level)
       elif dart_action == 'suppress':
         if comment:
           annotations.append('// %s' % comment)
-        annotations.append('@deprecated // %s' % support_level)
-        # TODO (blois): suppress generation of these APIs as a separate CL.
+        anAnnotation = 'deprecated'
+        if member_id:
+          anAnnotation = 'removed'
+        annotations.append('@%s // %s' % (anAnnotation, support_level))
         pass
       elif dart_action == 'stable':
         pass
       else:
         _logger.warn('Unknown dart_action - %s:%s' % (interface_id, member_id))
     elif support_level == 'untriaged':
       annotations.append('@Experimental() // untriaged')
     elif support_level == 'experimental':
       if comment:
         annotations.append('// %s' % comment)
@@ skipping 12 matching lines @@
       pass
     else:
       _logger.warn('Unknown support_level - %s:%s' % (interface_id, member_id))
 
     return annotations
 
   def Flush(self):
     json_file = open(self._api_status_path, 'w+')
     json.dump(self._types, json_file, indent=2, separators=(',', ': '), sort_keys=True)
     json_file.close()