Rename convert_404_to_None -> return_none_on_404.

third_party/WebKit/Tools/Scripts/webkitpy/common/net/web_mock.py

 # Copyright (C) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #    * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #    * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 17 matching lines @@
 
 import StringIO
 
 
 class MockWeb(object):
 
     def __init__(self, urls=None):
         self.urls = urls or {}
         self.urls_fetched = []
 
-    def get_binary(self, url, convert_404_to_None=False):
+    def get_binary(self, url, return_none_on_404=False):
         self.urls_fetched.append(url)
         if url in self.urls:
             return self.urls[url]
-        return "MOCK Web result, convert 404 to None=%s" % convert_404_to_None
+        return "MOCK Web result, convert 404 to None=%s" % return_none_on_404
 
 
 # FIXME: Classes which are using Browser probably want to use Web instead.
 class MockBrowser(object):
     params = {}
 
     def open(self, url):
         pass
 
     def select_form(self, name):
         pass
 
     def __setitem__(self, key, value):
         self.params[key] = value
 
     def submit(self):
         return StringIO.StringIO()