Don't use native D3D11.1 formats unless they support enough samples. The MSDN documentation states that BGRA4, RGB5A1 and RGB565 should all support 4 samples with DXGI 1.2 and D3D11.1 but some drivers appear to not have full support. Fall back to RGBA8 render targets when the driver cannot support at least 4 samples for ES3 feature levels. BUG=761489 Change-Id: I6bcd417700f1188945e8032ca6a64c4fbb2bc8a8 Reviewed-on: https://chromium-review.googlesource.com/652828 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>