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I always have trouble finding it in aura_init.cc. Also, it will get
slightly more complex in a follow-up CL.

Make ViewsDelegate have default implementations for its last two
pure-virtual methods, since it has default impls for all the other
ones.

Bug: none
Change-Id: I544872bdbc8668c99c20c7759c25185df4ba6433
Reviewed-on: https://chromium-review.googlesource.com/1114215Reviewed-by: Michael Wasserman <msw@chromium.org>
Commit-Queue: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570229}