Eliminate the old non blink code paths from idl generation

tools/dom/scripts/htmldartgenerator.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 for the system to generate
 dart:html APIs from the IDL database."""
 
 import emitter
 from generator import AnalyzeOperation, ConstantOutputOrder, \
@@ skipping 19 matching lines @@
   'History': 'HistoryBase',
 }
 
 _custom_factories = [
   'Notification',
   'EventSource',
 ]
 
 class HtmlDartGenerator(object):
   def __init__(self, interface, options, dart_use_blink):
-    # This goes away after the Chrome 35 roll (or whenever we commit to the
-    # dart:blink refactor)
     self._dart_use_blink = dart_use_blink
     self._database = options.database
     self._interface = interface
     self._type_registry = options.type_registry
     self._interface_type_info = self._type_registry.TypeInfo(self._interface.id)
     self._renamer = options.renamer
     self._metadata = options.metadata
     self._library_name = self._renamer.GetLibraryName(self._interface)
 
   def EmitSupportCheck(self):
@@ skipping 687 matching lines @@
     return self._type_registry.TypeInfo(type_name).narrow_dart_type()
 
   def _NarrowInputType(self, type_name):
     return self._NarrowToImplementationType(type_name)
 
   def _DartType(self, type_name):
     return self._type_registry.DartType(type_name)
 
   def _TypeInfo(self, type_name):
     return self._type_registry.TypeInfo(type_name)