For-of on null or undefined is an error

src/mips/full-codegen-mips.cc

Index: src/mips/full-codegen-mips.cc
diff --git a/src/mips/full-codegen-mips.cc b/src/mips/full-codegen-mips.cc
index 7174a22b3094f281afa0913ce97af92cedf5a9a0..1d8c7cc9dc59d2a250e42c95bae16c2949b777f5 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -1272,16 +1272,6 @@ void FullCodeGenerator::VisitForOfStatement(ForOfStatement* stmt) {
   Iteration loop_statement(this, stmt);
   increment_loop_depth();
 
-  // var iterable = subject
-  VisitForAccumulatorValue(stmt->assign_iterable());
-  __ mov(a0, v0);
-
-  // As with for-in, skip the loop if the iterator is null or undefined.
-  __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
-  __ Branch(loop_statement.break_label(), eq, a0, Operand(at));
-  __ LoadRoot(at, Heap::kNullValueRootIndex);
-  __ Branch(loop_statement.break_label(), eq, a0, Operand(at));
-
   // var iterator = iterable[Symbol.iterator]();
   VisitForEffect(stmt->assign_iterator());