Fix installer variable name bugaboo.

Fix installer variable name bugaboo.

This is a rare codepath used only by Chrome Frame uninstalls. It's rare
that it will be hit now, but leave correct code in place until the great
installer GCF cleanup rather than remove this one small piece now.

BUG=NONE
R=gab@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=285017

[gab, 2014-07-23 13:59:15]

lgtm

[commit-bot: I haz the power, 2014-07-23 14:00:09]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/grt@chromium.org/410923002/1

[commit-bot: I haz the power, 2014-07-23 15:06:05]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_dbg_triggered_tests on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/android_dbg_triggered...)
  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, 2014-07-23 16:16:50]

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

[commit-bot: I haz the power, 2014-07-23 16:16:51]

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

[gab, 2014-07-23 16:18:34]

The CQ bit was checked by gab@chromium.org

[commit-bot: I haz the power, 2014-07-23 16:19:22]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/grt@chromium.org/410923002/1

[commit-bot: I haz the power, 2014-07-23 19:45:30]

Change committed as 285017