GitLab

r296874 regressed initial tooltip sizing on Aura.
(Widget::SetContentsView sizes the view to the widget)

Reorder the View sizing to after the Widget init.

BUG=418456
TEST=The first Linux Aura tooltip is sized correctly.
R=sky@chromium.org

Review URL: https://codereview.chromium.org/613753003

Cr-Commit-Position: refs/heads/master@{#297281}