Safe HGraphBuilder::Add<> and New<>

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index f9524bc24f4be401b02983084f9ee7220a90f8f4..fba23fa0ca4ae113b424d9f45b3bd17027e37c20 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -1434,11 +1434,11 @@ class HGoto V8_FINAL : public HTemplateControlInstruction<1, 0> {
 
 class HDeoptimize V8_FINAL : public HTemplateControlInstruction<1, 0> {
  public:
-  static HInstruction* New(Zone* zone,
-                           HValue* context,
-                           const char* reason,
-                           Deoptimizer::BailoutType type,
-                           HBasicBlock* unreachable_continuation) {
+  static HDeoptimize* New(Zone* zone,
+                          HValue* context,
+                          const char* reason,
+                          Deoptimizer::BailoutType type,
+                          HBasicBlock* unreachable_continuation) {
     return new(zone) HDeoptimize(reason, type, unreachable_continuation);
   }