Fix uninitialized field in DisplayInfo ctor

Fix uninitialized field in DisplayInfo ctor

BUG=none
TESTS=Ran ash_unittests and ran TouchTransformerControllerTest.* with memcheck
NOTRY=true
TBR=mukai@chromium.org

Committed: https://crrev.com/45f5c20ef75acef17e455a8a55a34e76b0096979
Cr-Commit-Position: refs/heads/master@{#299139}

[dnicoara, 2014-10-10 18:13:20]

dnicoara@chromium.org changed reviewers:
+ mukai@chromium.org

[dnicoara, 2014-10-10 18:13:20]

PTAL

https://codereview.chromium.org/635403002 triggered a different path through the
unittest code for TouchTransformerControllerTest.* which caused the memory bot
to flag an uninitialized value.

[dnicoara, 2014-10-10 18:16:52]

The CQ bit was checked by dnicoara@chromium.org

[Jun Mukai, 2014-10-10 18:17:39]

lgtm

[dnicoara, 2014-10-10 18:17:51]

TBR-ing to green the bot.

[commit-bot: I haz the power, 2014-10-10 18:18:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/647023003/1

[commit-bot: I haz the power, 2014-10-10 18:19:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-10 18:19:49]

Patchset 1 (id:??) landed as
https://crrev.com/45f5c20ef75acef17e455a8a55a34e76b0096979
Cr-Commit-Position: refs/heads/master@{#299139}