CHROMIUM: Merge remote-tracking branch 'upstream/master' into chromeos-freedreno

Pull in many perf improvements and fixes.

BUG=b:145579089, b:154962441, b:154961574, b:147338253
TEST=PUBG, Clash of Clans, gfxbench, aquarium, playcanvas, etc

Change-Id: I305a568796160fff479265a7581f509451bb8c49