gpu: Remove target parameter from BufferQueue

|target| is already platform dependant.  Instead of passing
it around, derive it at the usage site.

BUG=none
TEST=none

Change-Id: Ia88c9c08f0f6c3aef8e21c56917027eb879ab299
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1516030
Reviewed-by: Antoine Labour <piman@chromium.org>
Commit-Queue: Fritz Koenig <frkoenig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#641339}
15 files changed