eguven 76c9968211 Add RepresentationKey and DashManifest copy method
RepresentationKey defines a representation location in a DashManifest.
DashManifest copy method creates a copy of the manifest which includes
only the representations pointed by the given RepresentationKeys.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=150195990
2017-03-15 18:50:07 +00:00
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