Compress sources of JS libraries in addition to the snapshot.

src/natives.h

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 34 matching lines @@
   // 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 int GetRawScriptSize(int index);
+  static Vector<const char> GetRawScriptSource(int index);
   static Vector<const char> GetScriptName(int index);
+  static Vector<const byte> GetScriptSource(int index);
+  static void SetRawScriptSource(int index, Vector<const char> raw_source);
 };
 
 typedef NativesCollection<CORE> Natives;
 typedef NativesCollection<EXPERIMENTAL> ExperimentalNatives;
 
 } }  // namespace v8::internal
 
 #endif  // V8_NATIVES_H_