| Index: components/sync/engine_impl/commit.h
 | 
| diff --git a/components/sync/engine_impl/commit.h b/components/sync/engine_impl/commit.h
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| index 585038f9d11db3d212e2492b47fac0bdf2519f28..5e19e2f9bf0d4a781fb52affdf5035b03131a90d 100644
 | 
| --- a/components/sync/engine_impl/commit.h
 | 
| +++ b/components/sync/engine_impl/commit.h
 | 
| @@ -36,8 +36,8 @@ class SyncCycle;
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|  // PostAndProcessCommitResponse() functions.  So they ended up here.
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|  class Commit {
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|   public:
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| -  typedef std::map<ModelType, std::unique_ptr<CommitContribution>>
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| -      ContributionMap;
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| +  using ContributionMap =
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| +      std::map<ModelType, std::unique_ptr<CommitContribution>>;
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|  
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|    Commit(ContributionMap contributions,
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|           const sync_pb::ClientToServerMessage& message,
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| 
 |