Turn on tracking of fields.

R=danno@chromium.org

Review URL: https://chromiumcodereview.appspot.com/14807006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14609 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/flag-definitions.h

@@ -193,8 +193,8 @@ DEFINE_bool(clever_optimizations,
             true,
             "Optimize object size, Array shift, DOM strings and string +")
 DEFINE_bool(pretenure_literals, true, "allocate literals in old space")
-DEFINE_bool(track_fields, false, "track fields with only smi values")
-DEFINE_bool(track_double_fields, false, "track fields with double values")
+DEFINE_bool(track_fields, true, "track fields with only smi values")
+DEFINE_bool(track_double_fields, true, "track fields with double values")
 DEFINE_implication(track_double_fields, track_fields)
 
 // Flags for data representation optimizations