| Index: src/flag-definitions.h | 
| diff --git a/src/flag-definitions.h b/src/flag-definitions.h | 
| index 1781f7f0bc38c6621dd27cdffa30daa8d56ef0af..f9165d4cb0dba74b16d34c64d6999856eb3287f6 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) | 
|  | 
|  |