Switch on code compaction on incremental GCs.

Review URL: https://chromiumcodereview.appspot.com/10928203

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12506 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/flag-definitions.h

@@ -412,7 +412,7 @@ DEFINE_bool(never_compact, false,
             "Never perform compaction on full GC - testing only")
 DEFINE_bool(compact_code_space, true,
             "Compact code space on full non-incremental collections")
-DEFINE_bool(incremental_code_compaction, false,
+DEFINE_bool(incremental_code_compaction, true,
             "Compact code space on full incremental collections")
 DEFINE_bool(cleanup_code_caches_at_gc, true,
             "Flush inline caches prior to mark compact collection and "