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This change moves these tests from Mac-only to all Views platforms,
although they are currently disabled on Windows & Linux because of the
linked bug. To do this, the tests are rewritten to use Views APIs rather
than directly using NSWindow, and PermissionRequestManagerTestApi is
modified to deal in Widgets rather than NativeWindows.

This change also removes PermissionBubbleViewsInteractiveUITest, which
was an incomplete copy of PermissionBubbleInteractiveUITest dating to
the initial MacViews secondary UI work, and also has never run on any
non-Mac platform.

Bug: 866878
Change-Id: Id0cbf5e2e1ec54afed57fd74e2c4380c1003de40
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2038157Reviewed-by: Balazs Engedy <engedy@chromium.org>
Reviewed-by: Bret Sepulveda <bsep@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#738574}