Support external startup data in V8.

src/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_NATIVES_H_
 #define V8_NATIVES_H_
 
+#include "src/vector.h"
+
+namespace v8 { class StartupData; }  // Forward declaration.
+
 namespace v8 {
 namespace internal {
 
 typedef bool (*NativeSourceCallback)(Vector<const char> name,
                                      Vector<const char> source,
                                      int index);
 
 enum NativeType {
   CORE, EXPERIMENTAL, D8, TEST
 };
@@ skipping 14 matching lines @@
   static int GetRawScriptsSize();
   static Vector<const char> GetRawScriptSource(int index);
   static Vector<const char> GetScriptName(int index);
   static Vector<const byte> GetScriptsSource();
   static void SetRawScriptsSource(Vector<const char> raw_source);
 };
 
 typedef NativesCollection<CORE> Natives;
 typedef NativesCollection<EXPERIMENTAL> ExperimentalNatives;
 
+#ifdef V8_USE_EXTERNAL_STARTUP_DATA
+// Used for reading the natives at runtime. Implementation in natives-empty.cc
+void SetNativesFromFile(StartupData* natives_blob);
+#endif
+
 } }  // namespace v8::internal
 
 #endif  // V8_NATIVES_H_