Remove code for the old Web Notification permission-path.

Remove code for the old Web Notification permission-path.

CL 393863002 switched Blink over to the new permission path for Web
Notifications, eliminating a synchronous IPC message and allowing the
rest of Web Notifications to be separated from WebFrame. Remove the
now unused code.

BUG=392187, 398045
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=287753

[Peter Beverloo, 2014-07-30 13:17:07]

This patch depends on the Blink patch to enable the new path:
  https://codereview.chromium.org/393863002/

(It should roll into Chromium first, too.)

[Peter Beverloo, 2014-07-30 13:17:24]

+palmer for IPC

[jochen (gone - plz use gerrit), 2014-07-30 13:47:58]

lgtm

[palmer, 2014-08-05 01:17:59]

lgtm

[Peter Beverloo, 2014-08-05 18:52:45]

The CQ bit was checked by peter@chromium.org

[commit-bot: I haz the power, 2014-08-05 18:54:06]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/peter@chromium.org/433433002/20001

[commit-bot: I haz the power, 2014-08-05 22:43:07]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_chromium_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[commit-bot: I haz the power, 2014-08-06 00:13:16]

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

[commit-bot: I haz the power, 2014-08-06 00:13:17]

Try jobs failed on following builders:
  linux_chromium_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Peter Beverloo, 2014-08-06 00:23:24]

The CQ bit was checked by peter@chromium.org

[commit-bot: I haz the power, 2014-08-06 00:25:32]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/peter@chromium.org/433433002/20001

[commit-bot: I haz the power, 2014-08-06 01:29:41]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_chromium_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[commit-bot: I haz the power, 2014-08-06 02:59:06]

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

[commit-bot: I haz the power, 2014-08-06 02:59:08]

Try jobs failed on following builders:
  linux_chromium_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Peter Beverloo, 2014-08-06 09:57:54]

The CQ bit was checked by peter@chromium.org

[commit-bot: I haz the power, 2014-08-06 09:59:25]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/peter@chromium.org/433433002/20001

[commit-bot: I haz the power, 2014-08-06 10:47:01]

Change committed as 287753