Revert of Remove obsolete V8_INFINITY macro.

src/ppc/lithium-codegen-ppc.cc

Index: src/ppc/lithium-codegen-ppc.cc
diff --git a/src/ppc/lithium-codegen-ppc.cc b/src/ppc/lithium-codegen-ppc.cc
index 2ab53e5588c12ee0bc3fcba4bad40483c343e0a6..7b6052c3e624ef89eb678241ef74dbffcfadf5dc 100644
--- a/src/ppc/lithium-codegen-ppc.cc
+++ b/src/ppc/lithium-codegen-ppc.cc
@@ -1,8 +1,6 @@
 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
-
-#include <limits>
 
 #include "src/v8.h"
 
@@ -4038,8 +4036,7 @@
   // Math.sqrt(-Infinity) == NaN
   Label skip, done;
 
-  __ LoadDoubleLiteral(temp, -std::numeric_limits<double>::infinity(),
-                       scratch0());
+  __ LoadDoubleLiteral(temp, -V8_INFINITY, scratch0());
   __ fcmpu(input, temp);
   __ bne(&skip);
   __ fneg(result, temp);