[interpreter] Record type feedback in the handlers for Inc and Dec.

src/interpreter/interpreter.h

Index: src/interpreter/interpreter.h
diff --git a/src/interpreter/interpreter.h b/src/interpreter/interpreter.h
index bb5b26649b387eb4d16665d12ecf3a3108cce67b..bbd01029994d678b5f727d2dbba83ca90ab9c4cf 100644
--- a/src/interpreter/interpreter.h
+++ b/src/interpreter/interpreter.h
@@ -97,6 +97,11 @@ class Interpreter {
   template <class Generator>
   void DoUnaryOp(InterpreterAssembler* assembler);
 
+  // Generates code to perform the unary operation via |Generator| while
+  // gatering type feedback.
+  template <class Generator>
+  void DoUnaryOpWithFeedback(InterpreterAssembler* assembler);
+
   // Generates code to perform the comparison operation associated with
   // |compare_op|.
   void DoCompareOp(Token::Value compare_op, InterpreterAssembler* assembler);