Safe HGraphBuilder::Add<> and New<>

src/code-stubs-hydrogen.cc

Index: src/code-stubs-hydrogen.cc
diff --git a/src/code-stubs-hydrogen.cc b/src/code-stubs-hydrogen.cc
index 3c90b5effa7ac16f8723b8732a4cf45c84d9f709..894c3d3b22df7f8e40ccf968d580091accc4a540 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -188,7 +188,7 @@ bool CodeStubGraphBuilderBase::BuildGraph() {
     if (!stack_parameter_count->IsConstant() &&
         descriptor_->hint_stack_parameter_count_ < 0) {
       HInstruction* constant_one = graph()->GetConstant1();
-      stack_pop_count = Add<HAdd>(stack_parameter_count, constant_one);
+      stack_pop_count = AddUncasted<HAdd>(stack_parameter_count, constant_one);
       stack_pop_count->ClearFlag(HValue::kCanOverflow);
       // TODO(mvstanton): verify that stack_parameter_count+1 really fits in a
       // smi.