GitLab

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Original CL: crrev.com/c/1107216
- Updates SigninPromoView to support a new UI Layout based on UIRefresh Phase 1 flag and a new
flag received on init.

Screenshots:
https://drive.google.com/open?id=1FnR436FEX9_3GwFbIIrJsQ8qHZOdqJpl
https://drive.google.com/open?id=1__aPHb1ye3WkiHKHJp9kIyJ6hhABq1Y6
https://drive.google.com/open?id=1ibjz3nnXHBrO_akJm4e9tgghpD85f3u0
https://drive.google.com/open?id=1dCVkiMW1IMQjWkxcegVxi8r1PLh5ZCqM
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Updates:
There were some issues when moving the UI setup from self, which I had tried to fix on the original
CL. I've now moved the UI setup to self, this means that some call to self will remain.

Bug: 805188
Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I4eab7b1b4388e1e4f41b0b9861ef44057d99aab7
Reviewed-on: https://chromium-review.googlesource.com/1118912Reviewed-by: Rohit Rao <rohitrao@chromium.org>
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#571922}