Collect type profile for DevTools.

src/ast/ast.cc

Index: src/ast/ast.cc
diff --git a/src/ast/ast.cc b/src/ast/ast.cc
index b039678124d27895893374ae397b30e60b52cb6c..6aaae04ea35bab04c21e3c78ba5af333e8c70f4c 100644
--- a/src/ast/ast.cc
+++ b/src/ast/ast.cc
@@ -283,8 +283,13 @@ Assignment::Assignment(Token::Value op, Expression* target, Expression* value,
 
 void Assignment::AssignFeedbackSlots(FeedbackVectorSpec* spec,
                                      LanguageMode language_mode,
-                                     FeedbackSlotCache* cache) {
+                                     FeedbackSlotCache* cache,
+                                     bool collect_type_profile) {
   AssignVectorSlots(target(), spec, language_mode, &slot_);
+
+  if (collect_type_profile) {
+    type_profile_slot_ = spec->AddTypeProfileSlot();
+  }
 }
 
 void CountOperation::AssignFeedbackSlots(FeedbackVectorSpec* spec,