Fix xtree patch check, and in turn C4702 disabling

Fix xtree patch check, and in turn C4702 disabling

Two bugs:
- IsPatched was backwards
- The output was "True"/"False", but .gyp was expecting "1"/"0".

R=cpu@chromium.org
BUG=346399
Committed: https://crrev.com/04dd0973fcc16a1839bf1a57ad9392857844ad52
Cr-Commit-Position: refs/heads/master@{#310409}

[cpu_(ooo_6.6-7.5), 2015-01-07 19:31:06]

lgtm

[scottmg, 2015-01-07 19:51:12]

The CQ bit was checked by scottmg@chromium.org

[commit-bot: I haz the power, 2015-01-07 19:52:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/836393002/1

[scottmg, 2015-01-07 22:04:14]

added warning fix in good ol'
chrome\browser\extensions\api\networking_private\networking_private_verify_delegate_factory_impl.cc

[scottmg, 2015-01-07 22:04:30]

The CQ bit was checked by scottmg@chromium.org

[commit-bot: I haz the power, 2015-01-07 22:05:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/836393002/20001

[commit-bot: I haz the power, 2015-01-07 23:42:22]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-01-07 23:43:18]

Patchset 2 (id:??) landed as
https://crrev.com/04dd0973fcc16a1839bf1a57ad9392857844ad52
Cr-Commit-Position: refs/heads/master@{#310409}