IDL: Add support for [Unscopeable] on attributes and methods

Source/bindings/templates/interface_base.cpp

Index: Source/bindings/templates/interface_base.cpp
diff --git a/Source/bindings/templates/interface_base.cpp b/Source/bindings/templates/interface_base.cpp
index ea5c732e40872d01d3d2a217d839c10bde592e0b..a4b71ff0b91a00e31da53a75f9873f5045f37314 100644
--- a/Source/bindings/templates/interface_base.cpp
+++ b/Source/bindings/templates/interface_base.cpp
@@ -418,6 +418,14 @@ static void install{{v8_class}}Template(v8::Local<v8::FunctionTemplate> function
     {% endfilter %}{# per_context_enabled() #}
     {% endif %}
     {# End special operations #}
+    {% if unscopeables %}
+    v8::Local<v8::Context> context(isolate->GetCurrentContext());
+    v8::Local<v8::Object> unscopeables(v8::Object::New(isolate));
+    {% for name in unscopeables %}
+    unscopeables->ForceSet(context, v8AtomicString(isolate, "{{name}}"), v8::True(isolate));
+    {% endfor %}
+    prototypeTemplate->Set(v8::Symbol::GetUnscopables(isolate), unscopeables);

[haraken, 2015/04/20 14:00:13]

Should we check a return value of ForceSet and Set?

bashi@: What should we do when the ForceSet and Set fails? Just ignore, or
ToLocalChecked?

+    {% endif %}
     {% if has_custom_legacy_call_as_function %}
     functionTemplate->InstanceTemplate()->SetCallAsFunctionHandler({{v8_class}}::legacyCallCustom);
     {% endif %}