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This CL uses |SetupBundledWebUIDataSource| to optimize network requests for the
profile picker main view and the profile creation flows.

Before:
Requests: 75 requests
Time: 5.28s

Optimized:
Requests: ~22 requests
Time: 601ms

Bug: 1129395
Change-Id: I51147a4f3cd57f1dc43d6ec3ca339e9df2781c80
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2416512Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>
Commit-Queue: Monica Basta <msalama@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811622}