Make the detailed reason for deopts mandatory on all platforms.

src/mips64/lithium-codegen-mips64.h

Index: src/mips64/lithium-codegen-mips64.h
diff --git a/src/mips64/lithium-codegen-mips64.h b/src/mips64/lithium-codegen-mips64.h
index a4b7adbd553d41f3e64f88e6aee25c6b0938bd63..b320dcb81767bff6d5490c7f8bdcb3925943483e 100644
--- a/src/mips64/lithium-codegen-mips64.h
+++ b/src/mips64/lithium-codegen-mips64.h
@@ -230,14 +230,12 @@ class LCodeGen: public LCodeGenBase {
   void RegisterEnvironmentForDeoptimization(LEnvironment* environment,
                                             Safepoint::DeoptMode mode);
   void DeoptimizeIf(Condition condition, LInstruction* instr,
-                    Deoptimizer::BailoutType bailout_type,
+                    Deoptimizer::BailoutType bailout_type, const char* detail,
                     Register src1 = zero_reg,
-                    const Operand& src2 = Operand(zero_reg),
-                    const char* detail = NULL);
+                    const Operand& src2 = Operand(zero_reg));
   void DeoptimizeIf(Condition condition, LInstruction* instr,
-                    Register src1 = zero_reg,
-                    const Operand& src2 = Operand(zero_reg),
-                    const char* detail = NULL);
+                    const char* detail, Register src1 = zero_reg,
+                    const Operand& src2 = Operand(zero_reg));
 
   void AddToTranslation(LEnvironment* environment,
                         Translation* translation,