RemoteCocoa clean-up

Move sources from ui/views_bridge_mac to
components/remote_cocoa/app_shim.

TBR=tapted

Bug: 958255
Change-Id: I34c0f8605d77a50c456044a0c11b34d81d2afe2e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1612557
Reviewed-by: ccameron <ccameron@chromium.org>
Commit-Queue: ccameron <ccameron@chromium.org>
Cr-Commit-Position: refs/heads/master@{#659820}
59 files changed