MIPS: Fix debug mode related porting mistakes.

src/mips/assembler-mips.h

Index: src/mips/assembler-mips.h
diff --git a/src/mips/assembler-mips.h b/src/mips/assembler-mips.h
index 1177181bde85c6aca14b4c65988bd9ae01826f3a..e6c9e76c7802c2477a1e13854ba967419790eca2 100644
--- a/src/mips/assembler-mips.h
+++ b/src/mips/assembler-mips.h
@@ -413,6 +413,11 @@ class CpuFeatures : public AllStatic {
             (static_cast<uint64_t>(1) << f)) != 0;
   }
 
+  static bool IsSafeForSnapshot(CpuFeature f) {
+    return (IsSupported(f) &&
+            (!Serializer::enabled() || !IsFoundByRuntimeProbingOnly(f)));
+  }
+
  private:
 #ifdef DEBUG
   static bool initialized_;