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When the status card is swiped away, the entire section is dismissed and
stays that way on NTPs opened afterwards. If the status of the section
changes (new snippets loaded, user logged in, etc.) the section will be
added back.

Preview: https://goo.gl/photos/ooDFBuAVCLauo4bbA

BUG=638580

Review-Url: https://codereview.chromium.org/2340333002
Cr-Commit-Position: refs/heads/master@{#419170}