[turbofan] Fix includes for JSOperatorBuilder.

src/type-feedback-vector.h

Index: src/type-feedback-vector.h
diff --git a/src/type-feedback-vector.h b/src/type-feedback-vector.h
index 5b1908a7a6e020034e836efa22f4a06ffb4e168d..8f097dfb1d7f8b04b8b211f92f7b07f633be69e1 100644
--- a/src/type-feedback-vector.h
+++ b/src/type-feedback-vector.h
@@ -201,7 +201,9 @@ class TypeFeedbackVector : public FixedArray {
   inline TypeFeedbackMetadata* metadata() const;
 
   // Conversion from a slot to an integer index to the underlying array.
-  static inline int GetIndex(FeedbackVectorSlot slot);
+  static int GetIndex(FeedbackVectorSlot slot) {
+    return kReservedIndexCount + slot.ToInt();
+  }
   static int GetIndexFromSpec(const FeedbackVectorSpec* spec,
                               FeedbackVectorSlot slot);