A64: Synchronize with r18147.

src/flag-definitions.h

Index: src/flag-definitions.h
diff --git a/src/flag-definitions.h b/src/flag-definitions.h
index 5d9f993b122e1131e2a3d2f87b5af322ffa38141..851b7b388f7a39b411ecbb6d6876824fcacc472e 100644
--- a/src/flag-definitions.h
+++ b/src/flag-definitions.h
@@ -171,6 +171,7 @@ DEFINE_bool(harmony_modules, false,
             "enable harmony modules (implies block scoping)")
 DEFINE_bool(harmony_symbols, false,
             "enable harmony symbols (a.k.a. private names)")
+DEFINE_bool(harmony_promises, false, "enable harmony promises")
 DEFINE_bool(harmony_proxies, false, "enable harmony proxies")
 DEFINE_bool(harmony_collections, false,
             "enable harmony collections (sets, maps, and weak maps)")
@@ -187,6 +188,7 @@ DEFINE_bool(harmony, false, "enable all harmony features (except typeof)")
 DEFINE_implication(harmony, harmony_scoping)
 DEFINE_implication(harmony, harmony_modules)
 DEFINE_implication(harmony, harmony_symbols)
+DEFINE_implication(harmony, harmony_promises)
 DEFINE_implication(harmony, harmony_proxies)
 DEFINE_implication(harmony, harmony_collections)
 DEFINE_implication(harmony, harmony_observation)
@@ -196,6 +198,7 @@ DEFINE_implication(harmony, harmony_numeric_literals)
 DEFINE_implication(harmony, harmony_strings)
 DEFINE_implication(harmony, harmony_arrays)
 DEFINE_implication(harmony, harmony_maths)
+DEFINE_implication(harmony_promises, harmony_collections)
 DEFINE_implication(harmony_modules, harmony_scoping)
 DEFINE_implication(harmony_observation, harmony_collections)
 
@@ -212,6 +215,8 @@ DEFINE_bool(pretenuring, true, "allocate objects in old space")
 DEFINE_bool(pretenuring_call_new, false, "pretenure call new")
 DEFINE_bool(allocation_site_pretenuring, false,
             "pretenure with allocation sites")
+DEFINE_bool(trace_pretenuring, false,
+            "trace pretenuring decisions of HAllocate instructions")
 DEFINE_bool(track_fields, true, "track fields with only smi values")
 DEFINE_bool(track_double_fields, true, "track fields with double values")
 DEFINE_bool(track_heap_object_fields, true, "track fields with heap values")
@@ -407,6 +412,9 @@ DEFINE_bool(enable_vldr_imm, false,
 // bootstrapper.cc
 DEFINE_string(expose_natives_as, NULL, "expose natives in global object")
 DEFINE_string(expose_debug_as, NULL, "expose debug in global object")
+#ifdef ADDRESS_SANITIZER
+DEFINE_bool(expose_free_buffer, false, "expose freeBuffer extension")
+#endif
 DEFINE_bool(expose_gc, false, "expose gc extension")
 DEFINE_string(expose_gc_as, NULL,
               "expose gc extension under the specified name")