GitLab

Remove Collapse from the WebFrame interface and move it directly
to the LocalFrame/RemoteFrame interfaces.

BUG=1008432

Change-Id: Ib8a7ce13b76a9618e075e175db8649f0c8ed7b71
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1920479Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#717651}