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This CL adds the CriOS tag + the major version to the User Agent used
to request the desktop version of websites for Chrome.
It also don't change anything for the other embedder of ios/web.

Bug: 1083999
Change-Id: Ief1bd073d4a664e3f02a3b3459ea34bd35152558
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2207314Reviewed-by: John Wu <jzw@chromium.org>
Reviewed-by: Paul Jensen <pauljensen@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Commit-Queue: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#772236}