[compiler] Introduce code stubs for abstract equality.

src/code-factory.cc

Index: src/code-factory.cc
diff --git a/src/code-factory.cc b/src/code-factory.cc
index a01cbfd5b8322d695b1f029533d89e278f5c49d3..034e139e7e3596c1089533d2cb90a3caf59fe9c1 100644
--- a/src/code-factory.cc
+++ b/src/code-factory.cc
@@ -219,6 +219,18 @@ Callable CodeFactory::GreaterThanOrEqual(Isolate* isolate) {
 }
 
 // static
+Callable CodeFactory::Equal(Isolate* isolate) {
+  EqualStub stub(isolate);
+  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
+}
+
+// static
+Callable CodeFactory::NotEqual(Isolate* isolate) {
+  NotEqualStub stub(isolate);
+  return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());
+}
+
+// static
 Callable CodeFactory::StrictEqual(Isolate* isolate) {
   StrictEqualStub stub(isolate);
   return Callable(stub.GetCode(), stub.GetCallInterfaceDescriptor());