Revert #315148 "[Android] Convert ContentShellTest.apk to isolate."

Revert #315148 "[Android] Convert ContentShellTest.apk to isolate."

This reverts commit 4cf59ffaa830d5edad26a439ba13f07ce0447394.

This patch appears to break the contentshell_instrumentation_tests on
the chromium.webkit waterfall. I'm not sure what to do about this,
as the .webkit tests appear to be run in a completely different
way than the .linux (main waterfall) tests, but I'm reverting this
for now and we can sort it out later.

TBR=jbudorick@chromium.org, maruel@chromium.org
BUG=400499
> Author: jbudorick <jbudorick@chromium.org>;
> Date:   Fri Feb 6 16:43:24 2015 -0800
>
>     [Android] Convert ContentShellTest.apk to isolate.
>
>     We were previously using --test-data to push files from
>     //content/test/data/android/device_files to
>     $EXTERNAL_STORAGE/chrome/test/data/content. Switching to isolate lets
>     us handle all of our instrumentation and gtest data dependencies in the
>     same way. It will also facilitate using isolate to optimize transfers
>     between builders and testers.
>
>     BUG=400499
>     TBR=maruel@chromium.org
>
>     Review URL: https://codereview.chromium.org/878163004
>
>     Cr-Commit-Position: refs/heads/master@{#315148}

Committed: https://crrev.com/6aac98abee2bb3a1a1a3d6a526a417219dbc9375
Cr-Commit-Position: refs/heads/master@{#315220}

[Dirk Pranke, 2015-02-07 23:08:21]

The CQ bit was checked by dpranke@chromium.org

[commit-bot: I haz the power, 2015-02-07 23:08:53]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/886993003/1

[Dirk Pranke, 2015-02-07 23:10:46]

Link to the first build failure:

https://build.chromium.org/p/chromium.webkit/builders/Android%20Tests%20%28db...

(it failed consistently after that).

[commit-bot: I haz the power, 2015-02-08 00:10:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-08 00:10:39]

Patchset 1 (id:??) landed as
https://crrev.com/6aac98abee2bb3a1a1a3d6a526a417219dbc9375
Cr-Commit-Position: refs/heads/master@{#315220}