Add gyp target to build preparser as stand-alone library.

src/flag-definitions.h

 // Copyright 2010 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 176 matching lines @@
 // codegen-ia32.cc / codegen-arm.cc
 DEFINE_bool(trace, false, "trace function calls")
 DEFINE_bool(defer_negation, true, "defer negation operation")
 DEFINE_bool(mask_constants_with_cookie,
             true,
             "use random jit cookie to mask large constants")
 
 // codegen.cc
 DEFINE_bool(lazy, true, "use lazy compilation")
 DEFINE_bool(trace_opt, false, "trace lazy optimization")
-DEFINE_bool(trace_opt_stats, false, "trace lazy optimization statistics")
 DEFINE_bool(opt, true, "use adaptive optimizations")
 DEFINE_bool(opt_eagerly, false, "be more eager when adaptively optimizing")
 DEFINE_bool(always_opt, false, "always try to optimize functions")
 DEFINE_bool(prepare_always_opt, false, "prepare for turning on always opt")
 DEFINE_bool(debug_info, true, "add debug information to compiled functions")
 DEFINE_bool(deopt, true, "support deoptimization")
 DEFINE_bool(trace_deopt, false, "trace deoptimization")
 
 // compiler.cc
 DEFINE_bool(strict, false, "strict error checking")
@@ skipping 303 matching lines @@
 #undef FLAG
 
 #undef DEFINE_bool
 #undef DEFINE_int
 #undef DEFINE_string
 
 #undef FLAG_MODE_DECLARE
 #undef FLAG_MODE_DEFINE
 #undef FLAG_MODE_DEFINE_DEFAULTS
 #undef FLAG_MODE_META