Revert of Switch Android Builder on chromium.webkit to gn.

Revert of Switch Android Builder on chromium.webkit to gn. (patchset #1 id:1 of https://codereview.chromium.org/1902643003/ )

Reason for revert:
too many gn issues.

Original issue's description:
> Switch Android Builder on chromium.webkit to gn.
>
> BUG=604468
>
> Committed: https://crrev.com/16d24abd98d2b5c87d2065ae29d27ea98ac92e51
> Cr-Commit-Position: refs/heads/master@{#388383}

TBR=dpranke@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=604468
Committed: https://crrev.com/0596520e084755c8deb81249f39694abd5ccdf04
Cr-Commit-Position: refs/heads/master@{#389622}

[jbudorick, 2016-04-25 21:16:14]

Created Revert of Switch Android Builder on chromium.webkit to gn.

[commit-bot: I haz the power, 2016-04-25 21:16:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1915853005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1915853005/1

[Dirk Pranke, 2016-04-25 21:20:04]

lgtm

[commit-bot: I haz the power, 2016-04-25 21:21:36]

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

[commit-bot: I haz the power, 2016-04-25 21:21:37]

Try jobs failed on following builders:
  ios_rel_device_gn on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios_rel_device_gn...)

[jbudorick, 2016-04-25 21:31:46]

The CQ bit was checked by jbudorick@chromium.org

[jbudorick, 2016-04-25 21:31:46]

The patchset sent to the CQ was uploaded after l-g-t-m from dpranke@chromium.org
Link to the patchset: https://codereview.chromium.org/1915853005/#ps40001
(title: "rebase")

[commit-bot: I haz the power, 2016-04-25 21:33:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1915853005/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1915853005/40001

[commit-bot: I haz the power, 2016-04-25 23:35:54]

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

[commit-bot: I haz the power, 2016-04-25 23:35:55]

Try jobs failed on following builders:
  android_clang_dbg_recipe on tryserver.chromium.android (JOB_TIMED_OUT, no
build URL)

[jbudorick, 2016-04-25 23:36:09]

The CQ bit was checked by jbudorick@chromium.org

[commit-bot: I haz the power, 2016-04-25 23:36:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1915853005/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1915853005/40001

[commit-bot: I haz the power, 2016-04-25 23:58:14]

Committed patchset #2 (id:40001)

[commit-bot: I haz the power, 2016-04-25 23:59:17]

Description was changed from

==========
Revert of Switch Android Builder on chromium.webkit to gn. (patchset #1 id:1 of
https://codereview.chromium.org/1902643003/ )

Reason for revert:
too many gn issues.

Original issue's description:
> Switch Android Builder on chromium.webkit to gn.
> 
> BUG=604468
> 
> Committed: https://crrev.com/16d24abd98d2b5c87d2065ae29d27ea98ac92e51
> Cr-Commit-Position: refs/heads/master@{#388383}

TBR=dpranke@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=604468
==========

to

==========
Revert of Switch Android Builder on chromium.webkit to gn. (patchset #1 id:1 of
https://codereview.chromium.org/1902643003/ )

Reason for revert:
too many gn issues.

Original issue's description:
> Switch Android Builder on chromium.webkit to gn.
>
> BUG=604468
>
> Committed: https://crrev.com/16d24abd98d2b5c87d2065ae29d27ea98ac92e51
> Cr-Commit-Position: refs/heads/master@{#388383}

TBR=dpranke@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=604468

Committed: https://crrev.com/0596520e084755c8deb81249f39694abd5ccdf04
Cr-Commit-Position: refs/heads/master@{#389622}
==========

[commit-bot: I haz the power, 2016-04-25 23:59:18]

Patchset 2 (id:??) landed as
https://crrev.com/0596520e084755c8deb81249f39694abd5ccdf04
Cr-Commit-Position: refs/heads/master@{#389622}