Move GoogleURLTracker away from base::Bind()

This is a preparation CL to migrate GoogleURLTracker from
URLFetcher to SimpleURLLoader.

BUG=714018

Change-Id: I1ba490d9fea5bf5c23212471f723407de488023f
Reviewed-on: https://chromium-review.googlesource.com/1042505
Commit-Queue: Antonio Gomes <tonikitoo@igalia.com>
Commit-Queue: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Peter Kasting <pkasting@chromium.org>
Reviewed-by: Maria Khomenko <mariakhomenko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#555962}
1 file changed