[serializer] do not cache resource data pointer for native source.

src/factory.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_FACTORY_H_
 #define V8_FACTORY_H_
 
 #include "src/isolate.h"
 #include "src/messages.h"
 #include "src/type-feedback-vector.h"
@@ skipping 206 matching lines @@
 
   // Creates a new external String object.  There are two String encodings
   // in the system: one-byte and two-byte.  Unlike other String types, it does
   // not make sense to have a UTF-8 factory function for external strings,
   // because we cannot change the underlying buffer.  Note that these strings
   // are backed by a string resource that resides outside the V8 heap.
   MUST_USE_RESULT MaybeHandle<String> NewExternalStringFromOneByte(
       const ExternalOneByteString::Resource* resource);
   MUST_USE_RESULT MaybeHandle<String> NewExternalStringFromTwoByte(
       const ExternalTwoByteString::Resource* resource);
+  // Create a new external string object for one-byte encoded native script.
+  // It does not cache the resource data pointer.
+  Handle<ExternalOneByteString> NewNativeSourceString(
+      const ExternalOneByteString::Resource* resource);
 
   // Create a symbol.
   Handle<Symbol> NewSymbol();
   Handle<Symbol> NewPrivateSymbol();
 
   // Create a global (but otherwise uninitialized) context.
   Handle<Context> NewNativeContext();
 
   // Create a script context.
   Handle<Context> NewScriptContext(Handle<JSFunction> function,
@@ skipping 477 matching lines @@
 
   // Create a JSArray with no elements and no length.
   Handle<JSArray> NewJSArray(ElementsKind elements_kind,
                              PretenureFlag pretenure = NOT_TENURED);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_FACTORY_H_