[turbofan] Ship TF for "with" and "for-of" constructs.

R=danno@chromium.org
BUG=v8:4131
LOG=N

Review URL: https://codereview.chromium.org/1148653005

Cr-Commit-Position: refs/heads/master@{#28545}

src/flag-definitions.h

@@ -383,7 +383,7 @@ DEFINE_BOOL(omit_map_checks_for_leaf_maps, true,
 
 // Flags for TurboFan.
 DEFINE_BOOL(turbo, false, "enable TurboFan compiler")
-DEFINE_BOOL(turbo_shipping, false, "enable TurboFan compiler on subset")
+DEFINE_BOOL(turbo_shipping, true, "enable TurboFan compiler on subset")
 DEFINE_BOOL(turbo_greedy_regalloc, false, "use the greedy register allocator")
 DEFINE_IMPLICATION(turbo, turbo_asm_deoptimization)
 DEFINE_STRING(turbo_filter, "~~", "optimization filter for TurboFan compiler")