Serializer: move to a subfolder and clean up includes.

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 {
-
-enum NativeType {
-  CORE, EXPERIMENTAL, D8, TEST
-};
-
-template <NativeType type>
-class NativesCollection {
- public:
-  // Number of built-in scripts.
-  static int GetBuiltinsCount();
-  // Number of debugger implementation scripts.
-  static int GetDebuggerCount();
-
-  // These are used to access built-in scripts.  The debugger implementation
-  // scripts have an index in the interval [0, GetDebuggerCount()).  The
-  // 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();
-};
-
-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);
-void ReadNatives();
-void DisposeNatives();
-#endif
-
-} }  // namespace v8::internal
-
-#endif  // V8_NATIVES_H_