GitLab

Fix google_play_services_default_java including legacy_http_javalib as a dep rather than a classpath-only jar

Also fixes proguard() GN template not rebasing paths when it should be.

BUG=624003

Review-Url: https://codereview.chromium.org/2103193002
Cr-Commit-Position: refs/heads/master@{#402688}