[turbofan] Next step towards shared operators.

src/compiler/ast-graph-builder.h

Index: src/compiler/ast-graph-builder.h
diff --git a/src/compiler/ast-graph-builder.h b/src/compiler/ast-graph-builder.h
index 65a46b6d020418aec6f5fb47c20a7af802590070..6a7e3db90e09c2871c245825411598ac4169a9b4 100644
--- a/src/compiler/ast-graph-builder.h
+++ b/src/compiler/ast-graph-builder.h
@@ -140,7 +140,7 @@ class AstGraphBuilder : public StructuredGraphBuilder, public AstVisitor {
 
   // Process arguments to a call by popping {arity} elements off the operand
   // stack and build a call node using the given call operator.
-  Node* ProcessArguments(Operator* op, int arity);
+  Node* ProcessArguments(const Operator* op, int arity);
 
   // Visit statements.
   void VisitIfNotNull(Statement* stmt);