Platform Apps: Disable history.state in platform_app.js

Platform Apps: Disable history.state in platform_app.js

This is a follow-up to https://codereview.chromium.org/988293002 and makes sure
that all blacklisted getters are handled uniformly. The corresponding test
(chrome/test/data/extensions/platform_apps/restrictions/main.js) already asserts
that history.state is inaccessible.

R=haraken@chromium.org
BUG=547116
Committed: https://crrev.com/a9914da1b0b8710b2f500c735e29953c3e56db97
Cr-Commit-Position: refs/heads/master@{#356040}

[Jakob Kummerow, 2015-10-26 12:23:23]

Kentaro, PTAL.

Yuki, FYI.

[haraken, 2015-10-26 12:24:12]

haraken@chromium.org changed reviewers:
+ yukishiino@chromium.org

[haraken, 2015-10-26 12:24:12]

Thanks, LGTM

[Finnur, 2015-10-26 12:26:24]

owners LGTM stamp.

[Jakob Kummerow, 2015-10-26 12:26:59]

The CQ bit was checked by jkummerow@chromium.org

[commit-bot: I haz the power, 2015-10-26 12:27:09]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1415453003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1415453003/1

[commit-bot: I haz the power, 2015-10-26 13:04:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-26 13:04:51]

Patchset 1 (id:??) landed as
https://crrev.com/a9914da1b0b8710b2f500c735e29953c3e56db97
Cr-Commit-Position: refs/heads/master@{#356040}

[Yuki, 2015-10-27 06:15:14]

lgtm