Revert of Replace references to old blink isolate files in gtest_test_instance.py.

Revert of Replace references to old blink isolate files in gtest_test_instance.py. (patchset #1 id:1 of https://codereview.chromium.org/1311533007/ )

Reason for revert:
broke android build, new isolate file probably needs an android clause

https://build.chromium.org/p/chromium.webkit/builders/WebKit%20Android%20%28Nexus4%29/builds/37274

Original issue's description:
> Replace references to old blink isolate files in gtest_test_instance.py.
>
> BUG=524758
>
> Committed: https://crrev.com/1f9c42098fe19c3daf4611fc58442009abd3ada9
> Cr-Commit-Position: refs/heads/master@{#346808}

TBR=dpranke@chromium.org,maruel@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=524758
Committed: https://crrev.com/1562830c56d1cc5ca70f51c4dd54660c1d3d641d
Cr-Commit-Position: refs/heads/master@{#346832}

[joelo, 2015-09-02 03:22:12]

Created Revert of Replace references to old blink isolate files in
gtest_test_instance.py.

[commit-bot: I haz the power, 2015-09-02 03:22:23]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1323073004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1323073004/1

[commit-bot: I haz the power, 2015-09-02 03:22:48]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-02 03:23:30]

Patchset 1 (id:??) landed as
https://crrev.com/1562830c56d1cc5ca70f51c4dd54660c1d3d641d
Cr-Commit-Position: refs/heads/master@{#346832}