Remove obsolete V8_INFINITY macro.

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index cdc68c865275d7897fc8ce25040eb7c9303663ea..004548997b3241f52374378a4a7e6b5f884e0f66 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -25,6 +25,8 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+#include <limits>
+
 #include "src/v8.h"
 
 #include "src/base/bits.h"
@@ -3842,7 +3844,7 @@ void LCodeGen::DoMathPowHalf(LMathPowHalf* instr) {
   // Math.pow(-Infinity, 0.5) == Infinity
   // Math.sqrt(-Infinity) == NaN
   Label done;
-  __ Move(temp, static_cast<double>(-V8_INFINITY));
+  __ Move(temp, std::numeric_limits<double>::infinity());
   __ BranchF(USE_DELAY_SLOT, &done, NULL, eq, temp, input);
   // Set up Infinity in the delay slot.
   // result is overwritten if the branch is not taken.