Rename animatable to interpolable in CSSProperties.in

Source/build/scripts/make_css_property_metadata.py

 #!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import sys
 
 import css_properties
 import in_generator
 from name_utilities import lower_first
 import template_expander
 
 
 class CSSPropertyMetadataWriter(css_properties.CSSProperties):
     filters = {
         'lower_first': lower_first,
     }
 
     def __init__(self, in_file_path):
         super(CSSPropertyMetadataWriter, self).__init__(in_file_path)
         self._outputs = {'CSSPropertyMetadata.cpp': self.generate_css_property_metadata_cpp}
 
     @template_expander.use_jinja('CSSPropertyMetadata.cpp.tmpl', filters=filters)
     def generate_css_property_metadata_cpp(self):
         return {
             'properties': self._properties,
-            'switches': [('animatable', 'isAnimatableProperty'),
+            'switches': [('interpolable', 'isInterpolableProperty'),
                          ('inherited', 'isInheritedProperty'),
                         ],
             'first_enum_value': self._first_enum_value,
         }
 
 
 if __name__ == '__main__':
     in_generator.Maker(CSSPropertyMetadataWriter).main(sys.argv)