Get rid of abstract modifier for members.

lib/html/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 440 matching lines @@
                  or not html_setter_name)
 
     # We don't yet handle inconsistent renames of the getter and setter yet.
     assert(not html_setter_name or html_name == html_setter_name)
 
     if not is_secondary:
       self._members_emitter.Emit('\n  /** @domName $DOMINTERFACE.$DOMNAME */',
           DOMINTERFACE=attribute.doc_js_interface_name,
           DOMNAME=dom_name)
       if read_only:
-        template = '\n  abstract $TYPE get $NAME;\n'
+        template = '\n  $TYPE get $NAME;\n'
       else:
         template = '\n  $TYPE $NAME;\n'
 
       self._members_emitter.Emit(template,
                                  NAME=html_name,
                                  TYPE=SecureOutputType(self, attribute.type.id))
 
     self._backend.AddAttribute(attribute, html_name, read_only)
 
   def AddSecondaryAttribute(self, interface, attribute):
@@ skipping 644 matching lines @@
 
     library_emitter = self._multiemitter.FileEmitter(library_file_path)
     library_file_dir = os.path.dirname(library_file_path)
     auxiliary_dir = os.path.relpath(auxiliary_dir, library_file_dir)
     imports_emitter = library_emitter.Emit(
         self._template, AUXILIARY_DIR=massage_path(auxiliary_dir))
     for path in sorted(self._path_to_emitter.keys()):
       relpath = os.path.relpath(path, library_file_dir)
       imports_emitter.Emit(
           "#source('$PATH');\n", PATH=massage_path(relpath))