Disable field type tracking by default.

BUG=365172
LOG=y
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/247913005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20902 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/flag-definitions.h

@@ -233,7 +233,7 @@ DEFINE_bool(track_computed_fields, true, "track computed boilerplate fields")
 DEFINE_implication(track_double_fields, track_fields)
 DEFINE_implication(track_heap_object_fields, track_fields)
 DEFINE_implication(track_computed_fields, track_fields)
-DEFINE_bool(track_field_types, true, "track field types")
+DEFINE_bool(track_field_types, false, "track field types")
 DEFINE_implication(track_field_types, track_fields)
 DEFINE_implication(track_field_types, track_heap_object_fields)
 DEFINE_bool(smi_binop, true, "support smi representation in binary operations")