Rework security checks to be based on Window rather than Frame.

third_party/WebKit/Source/bindings/templates/interface_base.cpp.tmpl

 {% filter format_blink_cpp_source_code %}
 
 {% include 'copyright_block.txt' %}
 #include "{{v8_class_or_partial}}.h"
 
 {% for filename in cpp_includes if filename != '%s.h' % cpp_class_or_partial %}
 #include "{{filename}}"
 {% endfor %}
 
 namespace blink {
@@ skipping 257 matching lines @@
 
   {% if named_property_getter and named_property_getter.is_cross_origin %}
   {% if named_property_getter.is_custom %}
   {{v8_class}}::namedPropertyGetterCustom(propertyName, info);
   {% else %}
   {{cpp_class}}V8Internal::namedPropertyGetter(propertyName, info);
   {% endif %}
   {% else %}
   BindingSecurity::failedAccessCheckFor(
       info.GetIsolate(),
-      {{v8_class}}::toImpl(info.Holder())->frame());
+      &{{v8_class}}::wrapperTypeInfo,
+      info.Holder());
   {% endif %}
 }
 {% endif %}
 
 {% if has_cross_origin_named_setter %}
 void {{v8_class_or_partial}}::crossOriginNamedSetter(v8::Local<v8::Name> name, v8::Local<v8::Value> value, const v8::PropertyCallbackInfo<v8::Value>& info) {
   if (!name->IsString())
     return;
   const AtomicString& propertyName = toCoreAtomicString(name.As<v8::String>());
 
   for (const auto& attribute : {{cpp_class_or_partial}}V8Internal::kCrossOriginAttributeTable) {
     if (propertyName == attribute.name && attribute.setter) {
       attribute.setter(value, V8CrossOriginSetterInfo(info.GetIsolate(), info.Holder()));
       return;
     }
   }
 
   {# If there were no matches in the cross-origin attribute table, consider it
      an access check failure: there are no custom named setters that are
      accessible from a cross-origin context. #}
 
   BindingSecurity::failedAccessCheckFor(
       info.GetIsolate(),
-      {{v8_class}}::toImpl(info.Holder())->frame());
+      &{{v8_class}}::wrapperTypeInfo,
+      info.Holder());
 }
 {% endif %}
 
 {% if has_cross_origin_named_enumerator %}
 void {{v8_class_or_partial}}::crossOriginNamedEnumerator(const v8::PropertyCallbackInfo<v8::Array>& info) {
   Vector<String> names;
   for (const auto& attribute : {{cpp_class_or_partial}}V8Internal::kCrossOriginAttributeTable)
     names.push_back(attribute.name);
 
   // Use the current context as the creation context, as a cross-origin access
@@ skipping 424 matching lines @@
 {% endif %}
 }
 {% endif %}
 
 {% endblock %}
 {##############################################################################}
 {% block partial_interface %}{% endblock %}
 }  // namespace blink
 
 {% endfilter %}{# format_blink_cpp_source_code #}