Convert UnaryOpStub to a HydrogenCodeStub

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 932fd47af13fc12bf081f3bb232063edd59ee7d2..08837c04fa66b7733f90c2c2464cab9222d1beb8 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -3078,6 +3078,11 @@ HType HCheckHeapObject::CalculateInferredType() {
 }
 
 
+HType HCheckSmi::CalculateInferredType() {
+  return HType::Smi();
+}
+
+
 HType HPhi::CalculateInferredType() {
   HType result = HType::Uninitialized();
   for (int i = 0; i < OperandCount(); ++i) {