Get rid of the binop_stub parameter to BuildBinaryOperation().

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index d11fbc0a0de21e66814f15526e8caafd9dfbecaa..441c4136800944ae9fde78f40ecc2d2686c6d579 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -1345,8 +1345,7 @@ class HGraphBuilder {
                                Handle<Type> left_type,
                                Handle<Type> right_type,
                                Handle<Type> result_type,
-                               Maybe<int> fixed_right_arg,
-                               bool binop_stub = false);
+                               Maybe<int> fixed_right_arg);
 
   HLoadNamedField* AddLoadFixedArrayLength(HValue *object);