Add assertion on testdata/countryinfo.txt sorting.

This will prevent silently creating bogus keys in FakeDownloader if the
sorting isn't as expected.

R=rouslan@chromium.org
BUG=

Review URL: https://codereview.appspot.com/113530043
1 file changed
tree: 5d551d536607fbb8fd8bfce7281a9dd0f727ef27
  1. cpp/
  2. externals/
  3. java/
  4. testdata/
  5. .gitmodules
  6. codereview.settings