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

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 568 matching lines @@
       # XMLHttpRequestProgressEvent can't be abstract we need to instantiate
       # for JsInterop.
       if (not(isinstance(self._backend, Dart2JSBackend)) and
         (self._interface.id == 'XMLHttpRequestProgressEvent' or
          self._interface.id == 'DOMStringMap')):
         # Suppress abstract for XMLHttpRequestProgressEvent and DOMStringMap
         # for Dartium.  Need to be able to instantiate the class; can't be abstract.
         class_modifiers = ''
       else:
         # For Dartium w/ JsInterop these suppressed interfaces are needed to
-        # instanciate the internal classes when wrap_jso is called for a JS object.
+        # instanciate the internal classes.
         if (self._renamer.ShouldSuppressInterface(self._interface) and
             not(isinstance(self._backend, Dart2JSBackend)) and
             self._options.dart_js_interop):
           class_modifiers = ''
         else:
           class_modifiers = 'abstract '
 
     native_spec = ''
     if not IsPureInterface(self._interface.id):
       native_spec = self._backend.NativeSpec()
 
     class_name = self._interface_type_info.implementation_name()
 
-    js_interop_equivalence_op = \
-      '  bool operator ==(other) => unwrap_jso(other) == unwrap_jso(this) || identical(this, other);\n' \
-      + '  int get hashCode => unwrap_jso(this).hashCode;\n'
-    # ClientRect overrides the equivalence operator.
-    if interface_name == 'ClientRect' or interface_name == 'DomRectReadOnly':
-        js_interop_equivalence_op = ''
-
     js_interop_wrapper = '''
 
   @Deprecated("Internal Use Only")
   static {0} internalCreate{0}() {{
     return new {0}._internalWrap();
   }}
 
   external factory {0}._internalWrap();
 
   @Deprecated("Internal Use Only")
   {0}.internal_() : super.internal_();
 
 '''.format(class_name)
     if base_class == 'NativeFieldWrapperClass2' or base_class == 'DartHtmlDomObject':
         js_interop_wrapper = '''
   @Deprecated("Internal Use Only")
   static {0} internalCreate{0}() {{
     return new {0}._internalWrap();
   }}
 
   factory {0}._internalWrap() {{
     return new {0}.internal_();
   }}
 
   @Deprecated("Internal Use Only")
   {0}.internal_() {{ }}
-
-{1}'''.format(class_name, js_interop_equivalence_op)
+'''.format(class_name)
         # Change to use the synthesized class so we can construct with a mixin
         # classes prefixed with name of NativeFieldWrapperClass2 don't have a
         # default constructor so classes with mixins can't be new'd.
         if (self._options.templates._conditions['DARTIUM'] and
             self._options.dart_js_interop and
             (self._interface.id == 'NamedNodeMap' or
              self._interface.id == 'CSSStyleDeclaration')):
             base_class = 'DartHtmlDomObject'
 
     implementation_members_emitter = implementation_emitter.Emit(
@@ skipping 688 matching lines @@
 
   def AddFile(self, basename, library_name, path):
     self._libraries[library_name].AddFile(path)
 
   def AddTypeEntry(self, library_name, idl_name, dart_name):
     self._libraries[library_name].AddTypeEntry(idl_name, dart_name)
 
   def Emit(self, emitter, auxiliary_dir):
     for lib in self._libraries.values():
       lib.Emit(emitter, auxiliary_dir)