rebaseline_server: use new intermediate JSON format

gm/rebaseline_server/column.py

 #!/usr/bin/python
 
 """
 Copyright 2014 Google Inc.
 
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file.
 
 ColumnHeaderFactory class (see class docstring for details)
 """
 
 # Keys used within dictionary representation of each column header.
+# NOTE: Keep these in sync with static/constants.js
 KEY__HEADER_TEXT = 'headerText'
 KEY__HEADER_URL = 'headerUrl'
 KEY__IS_FILTERABLE = 'isFilterable'
 KEY__IS_SORTABLE = 'isSortable'
 KEY__VALUES_AND_COUNTS = 'valuesAndCounts'
 
 
 class ColumnHeaderFactory(object):
   """Factory which assembles the header for a single column of data."""
 
@@ skipping 32 matching lines @@
     asdict = {
         KEY__HEADER_TEXT: self._header_text,
         KEY__IS_FILTERABLE: self._is_filterable,
         KEY__IS_SORTABLE: self._is_sortable,
     }
     if self._header_url:
       asdict[KEY__HEADER_URL] = self._header_url
     if self._include_values_and_counts and values_and_counts_dict:
       asdict[KEY__VALUES_AND_COUNTS] = values_and_counts_dict
     return asdict