Add method for killing Tasks with the same Tab ID

Add method for killing Tasks with the same Tab ID

Makes a method similar to DocumentUtilities.finishOtherTasksWithData(), but
specifically for killing tasks with the same DocumentTab ID.

BUG=445136
Committed: https://crrev.com/0c6fe288d83e1fa0bf2e4e049f067587c29028e2
Cr-Commit-Position: refs/heads/master@{#322675}

[gone, 2015-03-27 21:54:06]

dfalcantara@chromium.org changed reviewers:
+ mariakhomenko@chromium.org

[Maria, 2015-03-27 23:03:13]

lgtm

[gone, 2015-03-27 23:04:00]

The CQ bit was checked by dfalcantara@chromium.org

[commit-bot: I haz the power, 2015-03-27 23:04:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1044513002/1

[commit-bot: I haz the power, 2015-03-27 23:31:32]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-27 23:34:23]

Patchset 1 (id:??) landed as
https://crrev.com/0c6fe288d83e1fa0bf2e4e049f067587c29028e2
Cr-Commit-Position: refs/heads/master@{#322675}