Add target base_unittests_run and tools/isolate/isolate.py.

This target uses isolate.py to run the unit test in a separate directory.

BUG=98636
TEST=

Review URL: http://codereview.chromium.org/9513003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@125386 0039d316-1c4b-4281-b951-d872f2087c98
7 files changed