CHROMIUM: Merge remote-tracking branch 'upstream/master' into HEAD (r89 merge)

Pull in a fix for unaligned vector store instruction in 32b mesa builds.

BUG=b:178809357
TEST=webgl, glmark2, asphalt9, gfxbench, etc

Change-Id: Ic1f3137ec8d4348ec75704909aa58ac06d06a820