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- Update DesktopFocusRules so that only toplevel window is allowed
  to be activated in minimized state. Otherwise, a child window could
  be activated and cause DesktopNativeWidgetAura not getting
  activation change which in turn causes more problems down the road.
- Fix DesktopNativeWidgetAura so that RestoreFocusedView happens
  for a minimized widget

Bug: 942787
Change-Id: I0e3d35f342fca16cc78e451d6bf7fe32ac2dc337
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1536554
Commit-Queue: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Cr-Commit-Position: refs/heads/master@{#644565}