Revert of The AllUrlsApiTest.WhitelistedExtension test should no longer flake.

Revert of The AllUrlsApiTest.WhitelistedExtension test should no longer flake. (patchset #3 id:40001 of https://codereview.chromium.org/1442593002/ )

Reason for revert:
The WhitelistedExtension is still flaky on the XP Tests bot, see e.g. https://build.chromium.org/p/chromium.win/builders/XP%20Tests%20%281%29/builds/41174
stdio output:
[ RUN      ] AllUrlsApiTest.WhitelistedExtensionRunsOnExtensionPages
[1636:4084:1120/124530:WARNING:raw_channel.cc(208)] Shutting down RawChannel with write buffer nonempty
[139/464] AllUrlsApiTest.WhitelistedExtensionRunsOnExtensionPages (TIMED OUT)

Original issue's description:
> The AllUrlsApiTest.WhitelistedExtension test should no longer flake.
>
> The test had begun to hang after the refactoring that changed the way the extensions are loaded and reloaded. As a result of that refactoring, the test loaded the pages and tried to get some response from the extensions before they had time to reload.
>
> This change introduces waiting for the extensions reload, so the test should no longer flake.
>
> BUG=174341
>
> R=finnur@chromium.org
>
> Committed: https://crrev.com/454083864ede93660c2f08cf7d0e06ca10013c0d
> Cr-Commit-Position: refs/heads/master@{#359537}

TBR=finnur@chromium.org,voodoo@yandex-team.ru
NOPRESUBMIT=true
NOTREECHECKS=true
BUG=174341
Committed: https://crrev.com/0f33acbbc2fcee3068925f3b0b45955ab01802a9
Cr-Commit-Position: refs/heads/master@{#361090}

[magjed_chromium, 2015-11-23 11:15:50]

Created Revert of The AllUrlsApiTest.WhitelistedExtension test should no longer
flake.

[magjed_chromium, 2015-11-23 11:15:59]

The CQ bit was unchecked by magjed@chromium.org

[commit-bot: I haz the power, 2015-11-23 11:16:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1469813003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1469813003/1

[commit-bot: I haz the power, 2015-11-23 11:16:19]

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

[magjed_chromium, 2015-11-23 11:17:20]

Description was changed from

==========
Revert of The AllUrlsApiTest.WhitelistedExtension test should no longer flake.
(patchset #3 id:40001 of https://codereview.chromium.org/1442593002/ )

Reason for revert:
The WhitelistedExtension is still flaky on the XP Tests bot, see e.g.
https://build.chromium.org/p/chromium.win/builders/XP%20Tests%20%281%29/build...
stdio output:
[ RUN      ] AllUrlsApiTest.WhitelistedExtensionRunsOnExtensionPages
[1636:4084:1120/124530:WARNING:raw_channel.cc(208)] Shutting down RawChannel
with write buffer nonempty
[139/464] AllUrlsApiTest.WhitelistedExtensionRunsOnExtensionPages (TIMED OUT)

Original issue's description:
> The AllUrlsApiTest.WhitelistedExtension test should no longer flake.
> 
> The test had begun to hang after the refactoring that changed the way the
extensions are loaded and reloaded. As a result of that refactoring, the test
loaded the pages and tried to get some response from the extensions before they
had time to reload.
> 
> This change introduces waiting for the extensions reload, so the test should
no longer flake.
> 
> BUG=174341
> 
> R=finnur@chromium.org
> 
> Committed: https://crrev.com/454083864ede93660c2f08cf7d0e06ca10013c0d
> Cr-Commit-Position: refs/heads/master@{#359537}

TBR=finnur@chromium.org,voodoo@yandex-team.ru
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=174341
==========

to

==========
Revert of The AllUrlsApiTest.WhitelistedExtension test should no longer flake.
(patchset #3 id:40001 of https://codereview.chromium.org/1442593002/ )

Reason for revert:
The WhitelistedExtension is still flaky on the XP Tests bot, see e.g.
https://build.chromium.org/p/chromium.win/builders/XP%20Tests%20%281%29/build...
stdio output:
[ RUN      ] AllUrlsApiTest.WhitelistedExtensionRunsOnExtensionPages
[1636:4084:1120/124530:WARNING:raw_channel.cc(208)] Shutting down RawChannel
with write buffer nonempty
[139/464] AllUrlsApiTest.WhitelistedExtensionRunsOnExtensionPages (TIMED OUT)

Original issue's description:
> The AllUrlsApiTest.WhitelistedExtension test should no longer flake.
> 
> The test had begun to hang after the refactoring that changed the way the
extensions are loaded and reloaded. As a result of that refactoring, the test
loaded the pages and tried to get some response from the extensions before they
had time to reload.
> 
> This change introduces waiting for the extensions reload, so the test should
no longer flake.
> 
> BUG=174341
> 
> R=finnur@chromium.org
> 
> Committed: https://crrev.com/454083864ede93660c2f08cf7d0e06ca10013c0d
> Cr-Commit-Position: refs/heads/master@{#359537}

TBR=finnur@chromium.org,voodoo@yandex-team.ru
NOPRESUBMIT=true
NOTREECHECKS=true
BUG=174341
==========

[magjed_chromium, 2015-11-23 11:17:50]

The CQ bit was checked by magjed@chromium.org

[commit-bot: I haz the power, 2015-11-23 11:17:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1469813003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1469813003/1

[commit-bot: I haz the power, 2015-11-23 11:49:47]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-23 11:50:28]

Patchset 1 (id:??) landed as
https://crrev.com/0f33acbbc2fcee3068925f3b0b45955ab01802a9
Cr-Commit-Position: refs/heads/master@{#361090}