Can now correctly add documentation to constructors.

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 os
@@ skipping 409 matching lines @@
         NATIVESPEC=self._backend.NativeSpec())
     self._backend.StartInterface(self._implementation_members_emitter)
 
     self._backend.EmitHelpers(base_class)
     self._event_generator.EmitStreamProviders(
         self._interface,
         self._backend.CustomJSMembers(),
         self._implementation_members_emitter,
         self._library_name)
     self._backend.AddConstructors(
-        constructors, factory_provider, factory_constructor_name)
+        constructors, factory_provider, factory_constructor_name,
+        self._library_name)
 
     self._backend.EmitSupportCheck()
 
     events_class_name = self._event_generator.ProcessInterface(
         self._interface, interface_name,
         self._backend.CustomJSMembers(),
         implementation_emitter)
     if events_class_name:
       self._backend.EmitEventGetter(events_class_name)
 
@@ skipping 578 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)