Fix a typo: RemoveActivity should be called on Remove.

Fix a typo: RemoveActivity should be called on Remove.

TBR=oshima@chromium.org
TEST=None
BUG=None

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=274811

[Jun Mukai, 2014-06-03 23:03:52]

The CQ bit was checked by mukai@chromium.org

[commit-bot: I haz the power, 2014-06-03 23:06:03]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mukai@chromium.org/311943003/1

[commit-bot: I haz the power, 2014-06-04 02:51:32]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/linux_chromium_rel/bu...)
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)
  win_chromium_x64_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_x64_rel/...)

[commit-bot: I haz the power, 2014-06-04 06:39:42]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-06-04 06:39:43]

Try jobs failed on following builders:
  win_chromium_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_rel/buil...)

[Jun Mukai, 2014-06-04 07:08:27]

The CQ bit was checked by mukai@chromium.org

[commit-bot: I haz the power, 2014-06-04 07:09:23]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mukai@chromium.org/311943003/1

[commit-bot: I haz the power, 2014-06-04 13:59:25]

Change committed as 274811