[android] Make pdfium_unittests work on Android.

[android] Make pdfium_unittests work on Android.

This updates test.gni to match chromium as of
crrev.com/d29ecfa7dc3ed49a2a49002ab941adb57c53e923, changes how
PathService::GetSourceDir behaves on Android, and specifies the runtime
test data for test_support.

BUG=pdfium:415
Committed: https://pdfium.googlesource.com/pdfium/+/f6ee820732b8717d32d85a47938172080067ce4e

[jbudorick, 2016-11-29 14:17:33]

jbudorick@chromium.org changed reviewers:
+ dsinclair@chromium.org, thestig@chromium.org

[dsinclair, 2016-12-05 14:23:50]

The CQ bit was checked by dsinclair@chromium.org

[dsinclair, 2016-12-05 14:23:51]

lgtm

[commit-bot: I haz the power, 2016-12-05 14:23:57]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-12-05 14:50:51]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1480947830671200, "parent_rev":
"d65fd10e080751e42b9ea2696ae3f4e54839461c", "commit_rev":
"f6ee820732b8717d32d85a47938172080067ce4e"}

[commit-bot: I haz the power, 2016-12-05 14:50:55]

Description was changed from

==========
[android] Make pdfium_unittests work on Android.

This updates test.gni to match chromium as of
crrev.com/d29ecfa7dc3ed49a2a49002ab941adb57c53e923, changes how
PathService::GetSourceDir behaves on Android, and specifies the runtime
test data for test_support.

BUG=pdfium:415
==========

to

==========
[android] Make pdfium_unittests work on Android.

This updates test.gni to match chromium as of
crrev.com/d29ecfa7dc3ed49a2a49002ab941adb57c53e923, changes how
PathService::GetSourceDir behaves on Android, and specifies the runtime
test data for test_support.

BUG=pdfium:415

Committed:
https://pdfium.googlesource.com/pdfium/+/f6ee820732b8717d32d85a47938172080067...
==========

[commit-bot: I haz the power, 2016-12-05 14:50:55]

Committed patchset #1 (id:1) as
https://pdfium.googlesource.com/pdfium/+/f6ee820732b8717d32d85a47938172080067...