Added UMA stats for extensions events on addListener.

tools/json_schema_compiler/model.py

 # Copyright (c) 2012 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 copy
 import os.path
 import re
 
 from json_parse import OrderedDict
 
@@ skipping 413 matching lines @@
 def _GetEvents(parent, json, namespace):
   """Creates Function objects generated from the events in |json|.
   """
   events = OrderedDict()
   for event_json in json.get('events', []):
     event = Function(parent,
                      event_json['name'],
                      event_json,
                      namespace,
                      Origin(from_client=True))
+    event.histogram_name = event_json.get('histogram_name')
     events[event.name] = event
   return events
 
 def _GetProperties(parent, json, namespace, origin):
   """Generates Property objects extracted from |json|.
   """
   properties = OrderedDict()
   for name, property_json in json.get('properties', {}).items():
     properties[name] = Property(parent, name, property_json, namespace, origin)
   return properties
@@ skipping 14 matching lines @@
 def _GetPlatforms(json):
   if 'platforms' not in json:
     return None
   platforms = []
   for platform_name in json['platforms']:
     for platform_enum in _Enum.GetAll(Platforms):
       if platform_name == platform_enum.name:
         platforms.append(platform_enum)
         break
   return platforms