| Index: src/flag-definitions.h
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| diff --git a/src/flag-definitions.h b/src/flag-definitions.h
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| index 1781f7f0bc38c6621dd27cdffa30daa8d56ef0af..f728314ab38025c55d2263416b34580e483c2cd8 100644
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| --- a/src/flag-definitions.h
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| +++ b/src/flag-definitions.h
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| @@ -171,6 +171,7 @@ DEFINE_bool(harmony_modules, false,
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|              "enable harmony modules (implies block scoping)")
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|  DEFINE_bool(harmony_symbols, false,
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|              "enable harmony symbols (a.k.a. private names)")
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| +DEFINE_bool(harmony_promises, false, "enable harmony promises")
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|  DEFINE_bool(harmony_proxies, false, "enable harmony proxies")
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|  DEFINE_bool(harmony_collections, false,
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|              "enable harmony collections (sets, maps, and weak maps)")
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| @@ -187,6 +188,7 @@ DEFINE_bool(harmony, false, "enable all harmony features (except typeof)")
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|  DEFINE_implication(harmony, harmony_scoping)
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|  DEFINE_implication(harmony, harmony_modules)
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|  DEFINE_implication(harmony, harmony_symbols)
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| +DEFINE_implication(harmony, harmony_promises)
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|  DEFINE_implication(harmony, harmony_proxies)
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|  DEFINE_implication(harmony, harmony_collections)
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|  DEFINE_implication(harmony, harmony_observation)
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| @@ -196,6 +198,9 @@ DEFINE_implication(harmony, harmony_numeric_literals)
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|  DEFINE_implication(harmony, harmony_strings)
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|  DEFINE_implication(harmony, harmony_arrays)
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|  DEFINE_implication(harmony, harmony_maths)
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| +DEFINE_implication(harmony_promises, harmony_collections)
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| +// TODO(rossberg): this should go away before landing
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| +DEFINE_implication(harmony_promises, harmony_observation)
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|  DEFINE_implication(harmony_modules, harmony_scoping)
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|  DEFINE_implication(harmony_observation, harmony_collections)
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|  
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| 
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