[turbofan] Add NumberOperationHint for speculative number operations.

src/compiler/js-typed-lowering.h

Index: src/compiler/js-typed-lowering.h
diff --git a/src/compiler/js-typed-lowering.h b/src/compiler/js-typed-lowering.h
index 6968d428917abf1b0bcc63382d6e20f134acacc4..f5ae38c491cbc35d0a85de10455313a8bd6ad221 100644
--- a/src/compiler/js-typed-lowering.h
+++ b/src/compiler/js-typed-lowering.h
@@ -24,6 +24,7 @@ namespace compiler {
 class CommonOperatorBuilder;
 class JSGraph;
 class JSOperatorBuilder;
+class MachineOperatorBuilder;
 class SimplifiedOperatorBuilder;
 
 
@@ -85,7 +86,7 @@ class JSTypedLowering final : public AdvancedReducer {
   Reduction ReduceJSSubtract(Node* node);
   Reduction ReduceJSDivide(Node* node);
   Reduction ReduceInt32Binop(Node* node, const Operator* intOp);
-  Reduction ReduceUI32Shift(Node* node, Signedness left_signedness,
+  Reduction ReduceUI32Shift(Node* node, Signedness signedness,
                             const Operator* shift_op);
 
   Factory* factory() const;