Revert "Recognize and optimize a.runtimeType == b.runtimeType pattern."

runtime/lib/object.cc

Index: runtime/lib/object.cc
diff --git a/runtime/lib/object.cc b/runtime/lib/object.cc
index 530b2107f47935b2622909def56db1f0196104d2..e1b7a71c8eb53bfc7acd3a25760dcfbd6a5940a6 100644
--- a/runtime/lib/object.cc
+++ b/runtime/lib/object.cc
@@ -116,54 +116,12 @@ DEFINE_NATIVE_ENTRY(Object_noSuchMethod, 6) {
 
 DEFINE_NATIVE_ENTRY(Object_runtimeType, 1) {
   const Instance& instance = Instance::CheckedHandle(arguments->NativeArgAt(0));
-  if (instance.IsString()) {
-    return Type::StringType();
-  } else if (instance.IsInteger()) {
-    return Type::IntType();
-  } else if (instance.IsDouble()) {
-    return Type::Double();
-  }
+  // Special handling for following types outside this native.
+  ASSERT(!instance.IsString() && !instance.IsInteger() && !instance.IsDouble());
   return instance.GetType();
 }
 
 
-DEFINE_NATIVE_ENTRY(Object_haveSameRuntimeType, 2) {
-  const Instance& left = Instance::CheckedHandle(arguments->NativeArgAt(0));
-  const Instance& right = Instance::CheckedHandle(arguments->NativeArgAt(1));
-
-  const intptr_t left_cid = left.GetClassId();
-  const intptr_t right_cid = right.GetClassId();
-
-  if (left_cid != right_cid) {
-    if (RawObject::IsIntegerClassId(left_cid)) {
-      return Bool::Get(RawObject::IsIntegerClassId(right_cid)).raw();
-    } else if (RawObject::IsStringClassId(right_cid)) {
-      return Bool::Get(RawObject::IsStringClassId(right_cid)).raw();
-    } else {
-      return Bool::False().raw();
-    }
-  }
-
-  const Class& cls = Class::Handle(left.clazz());
-  if (cls.IsClosureClass()) {
-    // TODO(vegorov): provide faster implementation for closure classes.
-    const AbstractType& left_type = AbstractType::Handle(left.GetType());
-    const AbstractType& right_type = AbstractType::Handle(right.GetType());
-    return Bool::Get(left_type.raw() == right_type.raw()).raw();
-  }
-
-  if (!cls.IsGeneric()) {
-    return Bool::True().raw();
-  }
-
-  const TypeArguments& left_type_arguments =
-      TypeArguments::Handle(left.GetTypeArguments());
-  const TypeArguments& right_type_arguments =
-      TypeArguments::Handle(right.GetTypeArguments());
-  return Bool::Get(left_type_arguments.Equals(right_type_arguments)).raw();
-}
-
-
 DEFINE_NATIVE_ENTRY(Object_instanceOf, 4) {
   const Instance& instance =
       Instance::CheckedHandle(zone, arguments->NativeArgAt(0));