GitLab

In transition between clamshell mode and tablet mode, overview windows
shall be ignored when checking the topmost two windows to see if they
should carry over to split view. In other words, the topmost two non-
overview windows shall be considered for carrying over to split view.

Test: ash_unittests SplitViewTabDraggingTestWithClamshellSupport.DragTabFromSnappedWindowToOverviewAndThenExitTablet
Bug: 1004195, 1004426
Change-Id: I0a19891042678be4d80f74e3124b30bf54b0dc55
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1808790Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Commit-Queue: Avery Musbach <amusbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#697302}