Revert "Vulkan: readPixels improvement - use DynamicBuffer" This reverts commit 82a420bb9af221e659b9510aed6791a87ac97b25. Reason for revert: breaks readPixels on Android, probably because memory there is not host coherent by default. Original change's description: > Vulkan: readPixels improvement - use DynamicBuffer > > - Instead of using a new Staging image everytime, we now > just use a DynamicBuffer that should be bit less wasteful. > > Bug: angleproject:2480 > > Change-Id: I09edfb16f6ec49a0ca320d9e5dd9ce34e9dbf99e > Reviewed-on: https://chromium-review.googlesource.com/1059452 > Commit-Queue: Luc Ferron <lucferron@chromium.org> > Reviewed-by: Jamie Madill <jmadill@chromium.org> > Reviewed-by: Geoff Lang <geofflang@chromium.org> TBR=geofflang@chromium.org,jmadill@chromium.org,lucferron@chromium.org Change-Id: Id7c493915ec7131f5202a7224267a79cd53007d2 No-Presubmit: true No-Tree-Checks: true No-Try: true Bug: angleproject:2480 Reviewed-on: https://chromium-review.googlesource.com/1064770 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>