Collect type profile for DevTools.

src/ast/ast.h

Index: src/ast/ast.h
diff --git a/src/ast/ast.h b/src/ast/ast.h
index c3790b34b377fe448289a171d066207cdb8e998e..95bc3c02c4ccdacd8c8a8f7a4d67a899f37a00bb 100644
--- a/src/ast/ast.h
+++ b/src/ast/ast.h
@@ -2414,9 +2414,17 @@ class Assignment final : public Expression {
   }
 
   void AssignFeedbackSlots(FeedbackVectorSpec* spec, LanguageMode language_mode,
-                           FeedbackSlotCache* cache);
+                           FeedbackSlotCache* cache,
+                           bool collect_type_profile = false);
   FeedbackSlot AssignmentSlot() const { return slot_; }
 
+  FeedbackSlot TypeProfileSlot() const {
+    DCHECK(HasTypeProfileSlot());
+    return type_profile_slot_;
+  }
+
+  bool HasTypeProfileSlot() const { return !type_profile_slot_.IsInvalid(); }
+
  private:
   friend class AstNodeFactory;
 
@@ -2438,6 +2446,8 @@ class Assignment final : public Expression {
   Expression* value_;
   BinaryOperation* binary_operation_;
   SmallMapList receiver_types_;
+
+  FeedbackSlot type_profile_slot_;
 };