Pass WebPushError::ErrorTypePermissionDenied when appropriate.

Pass WebPushError::ErrorTypePermissionDenied when appropriate.

This will allow Blink to trigger the appropriate DOMException.

This CL is part of a three-sided patch:
  [1] https://codereview.chromium.org/1314493008/
  [2] This CL.
  [3] https://codereview.chromium.org/1313493003/

BUG=522206
Committed: https://crrev.com/13aeb042a708ad87c721b81d1a580880d8bfceef
Cr-Commit-Position: refs/heads/master@{#346634}

[Peter Beverloo, 2015-08-26 14:37:55]

peter@chromium.org changed reviewers:
+ mvanouwerkerk@chromium.org

[Peter Beverloo, 2015-08-26 14:37:55]

PTAL

[johnme, 2015-08-27 16:11:08]

johnme@chromium.org changed reviewers:
+ johnme@chromium.org

[johnme, 2015-08-27 16:11:08]

lgtm

[Michael van Ouwerkerk, 2015-09-01 10:01:48]

lgtm

[Peter Beverloo, 2015-09-01 11:35:04]

The CQ bit was checked by peter@chromium.org

[commit-bot: I haz the power, 2015-09-01 11:35:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1316973002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1316973002/1

[commit-bot: I haz the power, 2015-09-01 12:40:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-01 12:41:05]

Patchset 1 (id:??) landed as
https://crrev.com/13aeb042a708ad87c721b81d1a580880d8bfceef
Cr-Commit-Position: refs/heads/master@{#346634}