Reenable SSLUITest.TestCloseTabWithUnsafePopup
Reenable SSLUITest.TestCloseTabWithUnsafePopup

The test was broken because it wasn't able to open a popup without a user gesture.
It also wasn't properly checking if the pop up window opened.

BUG=2136

Review-Url: https://codereview.chromium.org/1968823002
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#392803}

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