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Instead of using an InitParams with options, this CL refactors to use
various setter functions to set the optional views and layout
parameters.

The above change will allow the default constructability of
MessageBoxView class.

BUG=1108460

Change-Id: I16a31e95fabef2b46281889777146e2888cde9cf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2367645
Commit-Queue: Wei Li <weili@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#801053}