[es6] Faster implementation of OrdinaryHasInstance.

src/mips/code-stubs-mips.cc

Index: src/mips/code-stubs-mips.cc
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index a740e434c183f647c55326cbcbd477b255f1de4d..bff853934f31ff72425a55d201a7ab7abf9ecd3d 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -1578,7 +1578,8 @@ void InstanceOfStub::Generate(MacroAssembler* masm) {
   // Slow-case: Call the %InstanceOf runtime function.
   __ bind(&slow_case);
   __ Push(object, function);
-  __ TailCallRuntime(Runtime::kInstanceOf);
+  __ TailCallRuntime(is_es6_instanceof() ? Runtime::kOrdinaryHasInstance
+                                         : Runtime::kInstanceOf);
 }