Convert ToBooleanStub to a HydrogenStub. Currently just using HBranch, which is still fully impleme…

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 6fbfd15f388054854e9b39a25faac0ffa7456dfd..f3934fcccc5c052316e53472f48e2906b75a474c 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -1561,6 +1561,9 @@ class HBranch: public HUnaryControlInstruction {
   }
   explicit HBranch(HValue* value)
       : HUnaryControlInstruction(value, NULL, NULL) { }
+  HBranch(HValue* value, ToBooleanStub::Types expected_input_types)
+      : HUnaryControlInstruction(value, NULL, NULL),
+        expected_input_types_(expected_input_types) { }
 
 
   virtual Representation RequiredInputRepresentation(int index) {