This reverts commit 799da6d1.

Reason for revert:Crashes have slowed down but there were two changes around the same time that may have caused it.  Relanding this to see if things improve.

Original change's description:
> Revert "D3D11: Resolve multisampled EGL surfaces at eglSwapBuffers"
> 
> An increased crash rate in rx::NativeWindow11Win32::createSwapChain has been
> seen around the same time as this patch landed.  Speculatively reverting.
> 
> BUG=887403
> 
> This reverts commit a49f60fe.
> 
> Change-Id: Id1b08efbf47196f17f4a5e509a29f7d628b07b49
> Reviewed-on: https://chromium-review.googlesource.com/1238884
> Reviewed-by: Geoff Lang <geofflang@chromium.org>
> Commit-Queue: Geoff Lang <geofflang@chromium.org>

TBR=geofflang@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 887403
Change-Id: Id862fbb1c0e764470f0b7f6bdb97bf6bab95d26b
Reviewed-on: https://chromium-review.googlesource.com/1251701Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>