MIPS: Remove uses of CanBeNegative() in HMod.

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 d8af6a67c799d96c5133662b82b0f78f5d2a4c96..d9619ed0e87513006ad9151e2065e70c37fbbf68 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -1082,7 +1082,7 @@ void LCodeGen::DoModByPowerOf2I(LModByPowerOf2I* instr) {
   int32_t mask = divisor < 0 ? -(divisor + 1) : (divisor - 1);
   Label dividend_is_not_negative, done;
 
-  if (hmod->left()->CanBeNegative()) {
+  if (hmod->CheckFlag(HValue::kLeftCanBeNegative)) {
     __ Branch(&dividend_is_not_negative, ge, dividend, Operand(zero_reg));
     // Note: The code below even works when right contains kMinInt.
     __ subu(dividend, zero_reg, dividend);