[es6] Reintroduce the instanceof operator in the backends.

src/interpreter/interpreter.cc

Index: src/interpreter/interpreter.cc
diff --git a/src/interpreter/interpreter.cc b/src/interpreter/interpreter.cc
index 226ddbd8533bca6b28763f4e475a673c93d3642d..9d2cd05d988d23196762beb5c152c24decca5639 100644
--- a/src/interpreter/interpreter.cc
+++ b/src/interpreter/interpreter.cc
@@ -1157,7 +1157,7 @@ void Interpreter::DoTestIn(InterpreterAssembler* assembler) {
 // Test if the object referenced by the <src> register is an an instance of type
 // referenced by the accumulator.
 void Interpreter::DoTestInstanceOf(InterpreterAssembler* assembler) {
-  DoBinaryOp(Runtime::kInstanceOf, assembler);
+  DoBinaryOp(CodeFactory::InstanceOf(isolate_), assembler);
 }
 
 void Interpreter::DoTypeConversionOp(Callable callable,