Expand overloaded methods and optional parameters in the html library.

tools/dom/scripts/systemhtml.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
 import logging
@@ skipping 40 matching lines @@
     'Element.insertAdjacentElement',
     'Element.insertAdjacentHTML',
     'Element.insertAdjacentText',
     'Element.webkitMatchesSelector',
     'Element.remove',
     'ElementEvents.mouseWheel',
     'ElementEvents.transitionEnd',
     'DOMException.name',
     'HTMLTableElement.createTBody',
     'IDBDatabase.transaction',
+    'IDBDatabase.transactionList',
+    'IDBDatabase.transactionStore',
+    'IDBDatabase.transactionStores',
     'KeyboardEvent.initKeyboardEvent',
     'Location.origin',
     'MouseEvent.offsetX',
     'MouseEvent.offsetY',
     'Navigator.language',
     'Navigator.webkitGetUserMedia',
     'ScriptProcessorNode._setEventListener',
     'URL.createObjectURL',
+    'URL.createObjectUrlFromSource',
+    'URL.createObjectUrlFromStream',
+    'URL.createObjectUrlFromBlob',
     'URL.revokeObjectURL',
     'WheelEvent.deltaMode',
     'WheelEvent.wheelDeltaX',
     'WheelEvent.wheelDeltaY',
     'Window.cancelAnimationFrame',
     'Window.console',
     'Window.document',
     'Window.indexedDB',
     'Window.location',
     'Window.open',
@@ skipping 869 matching lines @@
 
     parameter_names = [param_info.name for param_info in info.param_infos]
     parameter_types = [InputType(param_info.type_id)
                        for param_info in info.param_infos]
     operations = info.operations
 
     temp_version = [0]
 
     def GenerateCall(
         stmts_emitter, call_emitter, version, operation, argument_count):
-      target = '_%s_%d' % (html_name, version);
+      target = '_%s_%d' % (
+          html_name[1:] if html_name.startswith('_') else html_name, version);
       arguments = []
       target_parameters = []
       for position, arg in enumerate(operation.arguments[:argument_count]):
         conversion = self._InputConversion(arg.type.id, operation.id)
         param_name = operation.arguments[position].id
         if conversion:
           temp_version[0] += 1
           temp_name = '%s_%s' % (param_name, temp_version[0])
           temp_type = conversion.output_type
           stmts_emitter.Emit(
@@ skipping 219 matching lines @@
     for library_name in libraries:
       self._libraries[library_name] = DartLibrary(
           library_name, template_loader, library_type, output_dir)
 
   def AddFile(self, basename, library_name, path):
     self._libraries[library_name].AddFile(path)
 
   def Emit(self, emitter, auxiliary_dir):
     for lib in self._libraries.values():
       lib.Emit(emitter, auxiliary_dir)