Fix BlendMinMaxTest.RGBA16F on D3D11 Feature Level 9_3 This test checks for OES_texture_half_float, but it's trying to use a 16F texture as a color buffer so it should be checking for EXT_color_buffer_half_float. Since EXT_color_buffer_half_float requires more format support (e.g. R16F, RG16F, RGB16F) than OES_texture_half_float, it's possible for an implementation to support one extension and not the other. D3D11 Feature Level 9_3 does this. Change-Id: I40fb38aa3f419be2606464bd0476cd064afe90fa Reviewed-on: https://chromium-review.googlesource.com/319642 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Austin Kinross <aukinros@microsoft.com> Reviewed-by: Corentin Wallez <cwallez@chromium.org>