Refactor ScriptData class for cached compile data.

test/cctest/test-serialize.cc

Index: test/cctest/test-serialize.cc
diff --git a/test/cctest/test-serialize.cc b/test/cctest/test-serialize.cc
index c29f51fc1ae99286888f31d2f5e95a4fccfcd796..d692ffcce8c7ead04f0e6373d946e53aa4663d6e 100644
--- a/test/cctest/test-serialize.cc
+++ b/test/cctest/test-serialize.cc
@@ -177,9 +177,9 @@ class FileByteSink : public SnapshotByteSink {
       fclose(fp_);
     }
   }
-  virtual void Put(int byte, const char* description) {
+  virtual void Put(byte b, const char* description) {
     if (fp_ != NULL) {
-      fputc(byte, fp_);
+      fputc(b, fp_);
     }
   }
   virtual int Position() {