Remove obsolete V8_INFINITY macro.

src/mips/simulator-mips.cc

Index: src/mips/simulator-mips.cc
diff --git a/src/mips/simulator-mips.cc b/src/mips/simulator-mips.cc
index fabca67062fab264b5c9dff0192c308c18e67b9f..9320fbaecc8a7d7c298daee6d69b160a8f939cda 100644
--- a/src/mips/simulator-mips.cc
+++ b/src/mips/simulator-mips.cc
@@ -1288,7 +1288,8 @@ bool Simulator::set_fcsr_round_error(double original, double rounded) {
     set_fcsr_bit(kFCSRInexactFlagBit, true);
   }
 
-  if (rounded < DBL_MIN && rounded > -DBL_MIN && rounded != 0) {
+  if (rounded < std::numeric_limits<double>::min() &&
+      rounded > -std::numeric_limits<double>::min() && rounded != 0) {
     set_fcsr_bit(kFCSRUnderflowFlagBit, true);
     ret = true;
   }