Fix the ChromeVox generate_deps.py to create the parent dir for the output file.

Fix the ChromeVox generate_deps.py to create the parent dir for the output file.

BUG=417570
NOTREECHECKS=true
NOTRY=true
TBR=dmazzoni@chromium.org

Committed: https://crrev.com/76e477470adbfe3fb1ff6a99ab5feeb4ac57c13c
Cr-Commit-Position: refs/heads/master@{#296636}

[Lei Zhang, 2014-09-25 03:38:52]

TBR

[Lei Zhang, 2014-09-25 03:38:55]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2014-09-25 03:40:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/600333002/1

[Lei Zhang, 2014-09-25 03:49:55]

The CQ bit was unchecked by thestig@chromium.org

[Lei Zhang, 2014-09-25 03:50:05]

The CQ bit was checked by thestig@chromium.org

[commit-bot: I haz the power, 2014-09-25 03:51:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/600333002/1

[commit-bot: I haz the power, 2014-09-25 03:51:47]

Committed patchset #1 (id:1) as ad8d3e678d44a3ed2fc2347c624a8b38acefa896

[commit-bot: I haz the power, 2014-09-25 03:52:25]

Patchset 1 (id:??) landed as
https://crrev.com/76e477470adbfe3fb1ff6a99ab5feeb4ac57c13c
Cr-Commit-Position: refs/heads/master@{#296636}