Inlined IsFoundByRuntimeProbingOnly.

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
diff --git a/src/x64/assembler-x64.h b/src/x64/assembler-x64.h
index 1bbc995a03a63b0ddda5ec6aaee74f02c4623525..685d46c094aae9f01b905ed32757d65168ca99d5 100644
--- a/src/x64/assembler-x64.h
+++ b/src/x64/assembler-x64.h
@@ -463,15 +463,11 @@ class CpuFeatures : public AllStatic {
     return Check(f, supported_);
   }
 
-  static bool IsFoundByRuntimeProbingOnly(CpuFeature f) {
-    ASSERT(initialized_);
-    return Check(f, found_by_runtime_probing_only_);
-  }
-
   static bool IsSafeForSnapshot(Isolate* isolate, CpuFeature f) {
     return Check(f, cross_compile_) ||
            (IsSupported(f) &&
-            (!Serializer::enabled(isolate) || !IsFoundByRuntimeProbingOnly(f)));
+            !(Serializer::enabled(isolate) &&
+              Check(f, found_by_runtime_probing_only_)));
   }
 
   static bool VerifyCrossCompiling() {