[es2015] Remove the @@hasInstance protector cell.

src/full-codegen/x64/full-codegen-x64.cc

Index: src/full-codegen/x64/full-codegen-x64.cc
diff --git a/src/full-codegen/x64/full-codegen-x64.cc b/src/full-codegen/x64/full-codegen-x64.cc
index 2c0cca589c1c00e1490e28a7234ebbec7e70afaa..00aac5325d9f4de3597e69b67ec154ba5fccbb1d 100644
--- a/src/full-codegen/x64/full-codegen-x64.cc
+++ b/src/full-codegen/x64/full-codegen-x64.cc
@@ -2576,6 +2576,7 @@ void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
       SetExpressionPosition(expr);
       PopOperand(rdx);
       __ Call(isolate()->builtins()->InstanceOf(), RelocInfo::CODE_TARGET);
+      RestoreContext();
       PrepareForBailoutBeforeSplit(expr, false, NULL, NULL);
       __ CompareRoot(rax, Heap::kTrueValueRootIndex);
       Split(equal, if_true, if_false, fall_through);