Rename "extras exports" to "extras binding"

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index ef08b032dd21d7c73f6a0cb25109c789bcf88482..f91110fa8d8cdac851965ec88a94245e16155db6 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -5545,11 +5545,11 @@ void Context::DetachGlobal() {
 }
 
 
-Local<v8::Object> Context::GetExtrasExportsObject() {
+Local<v8::Object> Context::GetExtrasBindingObject() {
   i::Handle<i::Context> context = Utils::OpenHandle(this);
   i::Isolate* isolate = context->GetIsolate();
-  i::Handle<i::JSObject> exports(context->extras_exports_object(), isolate);
-  return Utils::ToLocal(exports);
+  i::Handle<i::JSObject> binding(context->extras_binding_object(), isolate);
+  return Utils::ToLocal(binding);
 }