When resolving URL, empty relative URL should remove ref component.
treea848ff96a0c169bf3e390a96721a5b5e3e261d61
-rw-r--r-- 3200 LICENSE.txt
-rw-r--r-- 3371 PRESUBMIT.py
-rw-r--r-- 2468 PRESUBMIT_unittest.py
-rw-r--r-- 8253 README.txt
drwxr-xr-x - base
drwxr-xr-x - build
drwxr-xr-x - src
drwxr-xr-x - third_party