The patches needs to by applied 'in-order' to not delete source files.

Added more tests.

R=dpranke@chromium.org
BUG=94330
TEST=

Review URL: http://codereview.chromium.org/8038056

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@103309 0039d316-1c4b-4281-b951-d872f2087c98