Always store GL_DEPTH_COMPONENT32_OES as a 24-bit depth format. Greatly simplifies the format utils by not having any internal format <-> DXGI format conversions depend on the client version. 32 bit floats and 24bit integers have very close precision in the [0,1] range so there should be no precision issues. BUG=angle:659 Change-Id: Ife64445ef35f77283fc4c70c98754f5e87b6fb19 Reviewed-on: https://chromium-review.googlesource.com/202507 Reviewed-by: Shannon Woods <shannonwoods@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>