Merged from GC branch to bleeding_edge

src/flag-definitions.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 441 matching lines @@
 DEFINE_bool(debug_serialization, false,
             "write debug information into the snapshot.")
 
 // spaces.cc
 DEFINE_bool(collect_heap_spill_statistics, false,
             "report heap spill statistics along with heap_stats "
             "(requires heap_stats)")
 
 DEFINE_bool(trace_isolates, false, "trace isolate state changes")
 
+DEFINE_bool(trace_live_byte_count, false,
+            "trace updates to page live byte count")
+
 // VM state
 DEFINE_bool(log_state_changes, false, "Log state changes.")
 
 // Regexp
 DEFINE_bool(regexp_possessive_quantifier,
             false,
             "enable possessive quantifier syntax for testing")
 DEFINE_bool(trace_regexp_bytecodes, false, "trace regexp bytecode execution")
 DEFINE_bool(trace_regexp_assembler,
             false,
@@ skipping 61 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