Revert of [serializer/debugger] hide scripts in the snapshot from the debugger.

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 153e3ff85d66bdbb4fb90df374f22d4b1ab45826..e8be36a32da43318448ba0e83d6a02bc96d8b3c4 100644
--- a/test/cctest/test-serialize.cc
+++ b/test/cctest/test-serialize.cc
@@ -638,11 +638,6 @@
         CompileRun("f()")->Int32Value(isolate1->GetCurrentContext());
     CHECK_EQ(42, result.FromJust());
     CHECK(CompileRun("this.g")->IsUndefined());
-    v8::Local<v8::Value> f = CompileRun("f");
-    i::Handle<i::JSFunction> function =
-        i::Handle<i::JSFunction>::cast(v8::Utils::OpenHandle(*f));
-    // Being part of the snapshot hides a script from the debugger.
-    CHECK(!function->shared()->IsSubjectToDebugging());
   }
   isolate1->Dispose();
 }