[interpreter] Introduce binary op bytecodes for Smi operand.

src/interpreter/interpreter.h

Index: src/interpreter/interpreter.h
diff --git a/src/interpreter/interpreter.h b/src/interpreter/interpreter.h
index 468486cf8f93d89eb45a0ef235930e9e4495f2ae..2007748dfb3833c8e8dba55d0b333bba132e78bd 100644
--- a/src/interpreter/interpreter.h
+++ b/src/interpreter/interpreter.h
@@ -74,6 +74,11 @@ class Interpreter {
   template <class Generator>
   void DoBinaryOp(InterpreterAssembler* assembler);
 
+  // Generates code to perform the binary operation via |Generator| using
+  // an immediate value rather the accumulator as the rhs operand.
+  template <class Generator>
+  void DoBinaryOpWithImmediate(InterpreterAssembler* assembler);
+
   // Generates code to perform the unary operation via |callable|.
   void DoUnaryOp(Callable callable, InterpreterAssembler* assembler);