Update visible ids if any of their thumbnails are invalid

Update visible ids if any of their thumbnails are invalid

For now, ThumbnailStore::UpdateVisibleIds only compares tab id lists to
determin whether updating visible ids is needed or not.

But we need to update them if any of their thumbnails are invalid.

BUG=468242
Committed: https://crrev.com/0ca3e6d8396850d5f529b8d859a684be2c3e5073
Cr-Commit-Position: refs/heads/master@{#321305}

[Jaekyun Seok (inactive), 2015-03-19 04:07:13]

jaekyun@chromium.org changed reviewers:
+ dtrainor@chromium.org, newt@chromium.org

[Jaekyun Seok (inactive), 2015-03-19 04:07:14]

Please review this CL.

[David Trainor- moved to gerrit, 2015-03-19 05:41:08]

lgtm

[Jaekyun Seok (inactive), 2015-03-19 05:47:26]

The CQ bit was checked by jaekyun@chromium.org

[commit-bot: I haz the power, 2015-03-19 05:47:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1005343004/1

[commit-bot: I haz the power, 2015-03-19 06:19:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-19 06:21:11]

Patchset 1 (id:??) landed as
https://crrev.com/0ca3e6d8396850d5f529b8d859a684be2c3e5073
Cr-Commit-Position: refs/heads/master@{#321305}