GitLab

With this change Android will stop using the old discardable memory path
and will use Skia's implementation of discardable memory and caching.

Tested on Android with ChromeShell.

BUG=169282

Review URL: https://codereview.chromium.org/303033004

git-svn-id: svn://svn.chromium.org/blink/trunk@175166 bbb929c8-8fbe-4397-9dbb-9b2b20218538