Change VKEY_MENU to VKEY_LMENU in interactive ui tests key sequence sending.

Change VKEY_MENU to VKEY_LMENU in interactive ui tests key sequence sending.

On windows depending on system/keyboard setting right alt (alt gr) can be
seen as alt+ctrl. This is also true for sending VKEY_MENU via SendInput,
probably because it is treated as any alt key. To avoid intorducing
unwanted ctrl key in sequence use VKEY_LMENU which will only add alt key
without a risk of adding ctrl key regardless of system setup.
The change fixes CommandsApiTest.DontOverwriteSystemShortcuts test timout.
Test expected alt+shift+f, but what was received was ctrl+alt+shift+f.

BUG=409567
Committed: https://crrev.com/6047562c6cd816727b7a78a0def63cc30f0999a5
Cr-Commit-Position: refs/heads/master@{#293112}

[mharanczyk, 2014-09-01 09:11:55]

mharanczyk@opera.com changed reviewers:
+ ben@chromium.org, sky@chromium.org

[mharanczyk, 2014-09-01 09:12:54]

PTAL.

[sky, 2014-09-02 17:34:05]

LGTM

[mharanczyk, 2014-09-03 08:22:12]

The CQ bit was checked by mharanczyk@opera.com

[commit-bot: I haz the power, 2014-09-03 08:22:56]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mharanczyk@opera.com/526063002/1

[commit-bot: I haz the power, 2014-09-03 09:40:40]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_chromium_rel_swarming on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)

[commit-bot: I haz the power, 2014-09-03 10:23:50]

Committed patchset #1 (id:1) as fd3cf72bd17dd7d46e999c1a45d8a24780c6c789

[commit-bot: I haz the power, 2014-09-10 03:24:54]

Patchset 1 (id:??) landed as
https://crrev.com/6047562c6cd816727b7a78a0def63cc30f0999a5
Cr-Commit-Position: refs/heads/master@{#293112}