The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d18a738c1075f5d4f70360469c2d26e41dd94ea2

commit d18a738c1075f5d4f70360469c2d26e41dd94ea2
Author: jbudorick <jbudorick@chromium.org>
Date: Tue Aug 30 05:31:41 2016

[Android] Fix symlink --output-directory handling in test_runner.py.

BUG= 641597 

Review-Url: https://codereview.chromium.org/2284143002
Cr-Commit-Position: refs/heads/master@{#415160}

[modify] https://crrev.com/d18a738c1075f5d4f70360469c2d26e41dd94ea2/build/android/test_runner.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/eaf4962623b1806b95621de597ac890a35b92570

commit eaf4962623b1806b95621de597ac890a35b92570
Author: jbudorick <jbudorick@chromium.org>
Date: Tue Aug 30 18:32:38 2016

[Android] Fix a few more symlink issues in test_runner.py.

BUG= 641597 

Review-Url: https://codereview.chromium.org/2294843002
Cr-Commit-Position: refs/heads/master@{#415364}

[modify] https://crrev.com/eaf4962623b1806b95621de597ac890a35b92570/build/android/pylib/gtest/gtest_test_instance.py
[modify] https://crrev.com/eaf4962623b1806b95621de597ac890a35b92570/build/android/pylib/instrumentation/instrumentation_test_instance.py
[modify] https://crrev.com/eaf4962623b1806b95621de597ac890a35b92570/build/android/test_runner.py

This should work now. Sorry about the long delay between initial report + fix.

Many thanks!