Fix for 3303 MultithreadedParallelIsolates has a race condition.

src/arm64/macro-assembler-arm64.h

Index: src/arm64/macro-assembler-arm64.h
diff --git a/src/arm64/macro-assembler-arm64.h b/src/arm64/macro-assembler-arm64.h
index 965d1dbfd9d5ef125b40d84ad83063079d40fcc3..7b845aba2e1750fd66e9e68ce1c6dd4bed9b1b3f 100644
--- a/src/arm64/macro-assembler-arm64.h
+++ b/src/arm64/macro-assembler-arm64.h
@@ -1981,13 +1981,7 @@ class MacroAssembler : public Assembler {
   // Return true if the sequence is a young sequence geneated by
   // EmitFrameSetupForCodeAgePatching. Otherwise, this method asserts that the
   // sequence is a code age sequence (emitted by EmitCodeAgeSequence).
-  static bool IsYoungSequence(byte* sequence);
-
-#ifdef DEBUG
-  // Return true if the sequence is a code age sequence generated by
-  // EmitCodeAgeSequence.
-  static bool IsCodeAgeSequence(byte* sequence);
-#endif
+  static bool IsYoungSequence(Isolate* isolate, byte* sequence);
 
   // Jumps to found label if a prototype map has dictionary elements.
   void JumpIfDictionaryInPrototypeChain(Register object, Register scratch0,