GitLab

This should make it possible to get rid of the ugly
relative paths in the isolate files.

I'm including an example for base_unittests.isolate for 
demonstrative purposes only. I can remove it (or convert all
.isolate files in Chromium) before landing.

BUG=343106
TEST=Successful compile+test on Linux using:
ninja -C out/Release base_unittests_run xdisplaycheck
tools/swarming_client/isolate.py run -s out/Release/base_unittests.isolated

Review URL: https://codereview.chromium.org/322403003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@276671 0039d316-1c4b-4281-b951-d872f2087c98