GitLab

GuestViewAttachRequest class is never constructed. This means that
GuestViewHostMsg_AttachGuest can be removed as well.

BUG=1143268

Change-Id: I5631a5aacb68a426ec1f5d101aea28cd180b86ae
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2587373Reviewed-by: Lucas Gadani <lfg@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836836}