VectorICs - turn on vector ICs for LoadIC and KeyedLoadIC

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/1075823002

Cr-Commit-Position: refs/heads/master@{#27691}

src/flag-definitions.h

@@ -257,7 +257,7 @@ DEFINE_BOOL(track_field_types, true, "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")
-DEFINE_BOOL(vector_ics, false, "support vector-based ics")
+DEFINE_BOOL(vector_ics, true, "support vector-based ics")
 
 // Flags for optimization types.
 DEFINE_BOOL(optimize_for_size, false,