Optimize dartium dart:html bindings so real world application performance is acceptable. Improves d…

tools/dom/scripts/css_code_generator.py

 #!/usr/bin/python
 #
 # Copyright (c) 2014, 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.
 
 """Generates CSSStyleDeclaration template file from css property definitions
 defined in WebKit."""
 
 import tempfile, os, re
@@ skipping 136 matching lines @@
     // not having a value at all. (Ultimately we'll want the native method to
     // return null if the property doesn't exist and empty string if it's
     // defined but just doesn't have a value.
     return _hasProperty(propertyName);
 $endif
   }
 
 $if DARTIUM
   bool _hasProperty(String propertyName) =>
   $if JSINTEROP
-      _blink.BlinkCSSStyleDeclaration.instance.$__propertyQuery___Callback_1_(unwrap_jso(this), propertyName) != null;
+      _blink.BlinkCSSStyleDeclaration.instance.$__propertyQuery___Callback_1_(this, propertyName);
   $else
       _blink.BlinkCSSStyleDeclaration.$__propertyQuery___Callback_1(this, propertyName);
   $endif
 $endif
 
   @DomName('CSSStyleDeclaration.setProperty')
   void setProperty(String propertyName, String value, [String priority]) {
     return _setPropertyHelper(_browserPropertyName(propertyName),
       value, priority);
   }
@@ skipping 186 matching lines @@
       class_lines.append(annotated[base_css_name])
     class_lines.append("""
   set %s(String value) {
     setProperty('%s', value, '');
   }
 """ % (camel_case_name, css_name))
 
   class_file.write(''.join(class_lines));
   class_file.write('}\n')
   class_file.close()