Enable html_dartium to be built as part of dartium build

lib/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."""
 
 from systemfrog import *
 from systeminterface import *
@@ skipping 1122 matching lines @@
     """Returns the file emitter of the Frog implementation file."""
     # TODO(jmesserly): is this the right path
     path = os.path.join(self._output_dir, 'html', 'frog', '%s.dart' % name)
     self._dart_frog_file_paths.append(path)
     return self._emitters.FileEmitter(path)
 
 # -----------------------------------------------------------------------------
 
 class HtmlDartiumSystem(HtmlSystem):
 
-  def __init__(self, templates, database, emitters, output_dir, generator):
+  def __init__(self, templates, database, emitters, auxiliary_dir, output_dir,
+               generator):
     """Prepared for generating wrapping implementation.
 
     - Creates emitter for Dart code.
     """
     super(HtmlDartiumSystem, self).__init__(
         templates, database, emitters, output_dir, generator)
+    self._auxiliary_dir = auxiliary_dir
     self._shared = HtmlSystemShared(database, generator)
     self._dart_dartium_file_paths = []
     self._wrap_cases = []
 
   def InterfaceGenerator(self,
                          interface,
                          common_prefix,
                          super_interface_name,
                          source_filter):
     """."""
@@ skipping 12 matching lines @@
     """Returns the file emitter of the Dartium implementation file."""
     path = os.path.join(self._output_dir, 'html', 'dartium', '%s.dart' % name)
     self._dart_dartium_file_paths.append(path)
     return self._emitters.FileEmitter(path);
 
   def ProcessCallback(self, interface, info):
     pass
 
   def GenerateLibraries(self, lib_dir):
     # Library generated for implementation.
+    auxiliary_dir = os.path.relpath(self._auxiliary_dir, self._output_dir)
+
     self._GenerateLibFile(
         'html_dartium.darttemplate',
         os.path.join(lib_dir, 'html_dartium.dart'),
         (self._interface_system._dart_interface_file_paths +
          self._interface_system._dart_callback_file_paths +
          self._dart_dartium_file_paths
          ),
+        AUXILIARY_DIR=MassagePath(auxiliary_dir),
         WRAPCASES='\n'.join(self._wrap_cases))
 
   def Finish(self):
     pass
 
 # ------------------------------------------------------------------------------
 
 # TODO(jacobr): there is far too much duplicated code between these bindings
 # and the Frog bindings.  A larger scale refactoring needs to be performed to
 # reduce the duplicated logic.
@@ skipping 492 matching lines @@
     # dispatch has removed f(X), leaving only f(Y), but there is no guarantee
     # that Y = Z-X, so we need to check for Y.
     true_code = emitter.Emit(
         '$(INDENT)if ($COND) {\n'
         '$!TRUE'
         '$(INDENT)}\n',
         COND=test, INDENT=indent)
     self.GenerateDispatch(
         true_code, info, indent + '  ', position + 1, positive)
     return True