Switch to recipe engine "url" module.

BUG=None
TEST=expectations
R=iannucci@chromium.org

Change-Id: I43a65405c957cb6dddd64f61846b926d81046752
Reviewed-on: https://chromium-review.googlesource.com/505278Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Commit-Queue: Daniel Jacques <dnj@chromium.org>

recipes/recipe_modules/gitiles/__init__.py

@@ -3,5 +3,5 @@ DEPS = [
     'recipe_engine/path',
     'recipe_engine/python',
     'recipe_engine/raw_io',
-    'url',
+    'recipe_engine/url',
 ]