media: Remove extension code in ProtectedMediaIdentifierPermissionContext.

media: Remove extension code in ProtectedMediaIdentifierPermissionContext.

Extensions are not supported on Android, so this code is dead.

BUG=446263
Committed: https://crrev.com/f86b06271c251b523a679b37e53318a3b17563fa
Cr-Commit-Position: refs/heads/master@{#314080}

[xhwang, 2015-01-31 01:20:13]

xhwang@chromium.org changed reviewers:
+ kkimlabs@chromium.org

[xhwang, 2015-01-31 01:20:13]

PTAL

We may still need to handle extensions when we use this for ChromeOS. But the
current extensions handling code seems wrong.

[Kibeom Kim (inactive), 2015-01-31 01:22:55]

lgtm

[xhwang, 2015-01-31 01:24:53]

The CQ bit was checked by xhwang@chromium.org

[commit-bot: I haz the power, 2015-01-31 01:26:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/893723002/1

[commit-bot: I haz the power, 2015-01-31 07:27:22]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-01-31 07:27:23]

Try jobs failed on following builders:
  win8_chromium_gn_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win8_chromium_gn_...)

[xhwang, 2015-02-01 03:05:22]

The CQ bit was checked by xhwang@chromium.org

[commit-bot: I haz the power, 2015-02-01 03:05:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/893723002/1

[commit-bot: I haz the power, 2015-02-01 03:06:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-01 03:07:12]

Patchset 1 (id:??) landed as
https://crrev.com/f86b06271c251b523a679b37e53318a3b17563fa
Cr-Commit-Position: refs/heads/master@{#314080}