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

src/snapshot/natives.h

 // Copyright 2011 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_SNAPSHOT_NATIVES_H_
 #define V8_SNAPSHOT_NATIVES_H_
 
 #include "src/objects.h"
 #include "src/vector.h"
 
@@ skipping 26 matching lines @@
   // non-debugger scripts have an index in the interval [GetDebuggerCount(),
   // GetNativesCount()).
   static int GetIndex(const char* name);
   static Vector<const char> GetScriptSource(int index);
   static Vector<const char> GetScriptName(int index);
   static Vector<const char> GetScriptsSource();
 
   // The following methods are implemented in natives-common.cc:
 
   static FixedArray* GetSourceCache(Heap* heap);
-  static void UpdateSourceCache(Heap* heap);
 };
 
 typedef NativesCollection<CORE> Natives;
 typedef NativesCollection<EXPERIMENTAL> ExperimentalNatives;
 typedef NativesCollection<EXTRAS> ExtraNatives;
 typedef NativesCollection<EXPERIMENTAL_EXTRAS> ExperimentalExtraNatives;
 
 
 #ifdef V8_USE_EXTERNAL_STARTUP_DATA
 // Used for reading the natives at runtime. Implementation in natives-empty.cc
 void SetNativesFromFile(StartupData* natives_blob);
 void ReadNatives();
 void DisposeNatives();
 #endif
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_SNAPSHOT_NATIVES_H_