macviews: don't try to use zero-size modals

The Mac window system doesn't support zero-size windows, so it's important that
DialogTestBrowserWindow not impose a 0x0 maximum size on constrained dialogs.

This fixes a slew of constrained window tests, like PrintPreviewUIUnitTest.*
and PrintPreviewDialogControllerUnitTest.*.

TBR=sky@chromium.org

Bug: 832676
Change-Id: I0708d20ef7e16468af6e13980994d063e3b7e87a
Reviewed-on: https://chromium-review.googlesource.com/1148011
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577502}
1 file changed