Add support to cache arbitrary file.
Rename repository_root to REPOSITORY_ROOT.

Review URL: http://codereview.chromium.org/115615

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@16598 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed