Get rid of unique_ptrs for UpdateResponseData and EntityData.

Immutability for const UpdateResponseDataList should be preserved for
its members UpdateResponseData and EntityData. That's why this CL
replaces unique_ptrs with movable semantics for UpdateResponseData
and EntityData.

Bug: 1029267
Change-Id: Ia5e8d35e81939ed9f21ebb56c9d5922c053fc42d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1980736
Commit-Queue: Mikel Astiz <[email protected]>
Reviewed-by: Olivier Robin <[email protected]>
Reviewed-by: Scott Violet <[email protected]>
Reviewed-by: Alan Cutter <[email protected]>
Reviewed-by: Dominic Battré <[email protected]>
Reviewed-by: Istiaque Ahmed <[email protected]>
Reviewed-by: Mikel Astiz <[email protected]>
Cr-Commit-Position: refs/heads/master@{#729693}
38 files changed