[interpreter] Properly collect for-in slow mode feedback.

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index 0af549ca266c36216362c248b7d63ae9cf2bff40..4157ed531597037845deea68284f4bf043a20018 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -1128,7 +1128,8 @@ void BytecodeGenerator::VisitForInStatement(ForInStatement* stmt) {
   builder()->ForInDone(index, cache_length);
   loop_builder.BreakIfTrue();
   DCHECK(Register::AreContiguous(cache_type, cache_array));
-  builder()->ForInNext(receiver, index, cache_type);
+  FeedbackVectorSlot slot = stmt->ForInFeedbackSlot();
+  builder()->ForInNext(receiver, index, cache_type, feedback_index(slot));
   loop_builder.ContinueIfUndefined();
   VisitForInAssignment(stmt->each(), stmt->EachFeedbackSlot());
   VisitIterationBody(stmt, &loop_builder);