Add missing TexImage and CopyTexImage format combinations for ES3. * Some unsized DEPTH_COMPONENT combinations were not added to the validation tables for the ANGLE_depth_texture extension. * The HALF_FLOAT_OES format was not validated in ES3 for RGB and RGBA formats when the OES_texture_half_float extension is supported. * BGRA->BGRA CopyTexImage validation was missing. No more errors are generated within ANGLE when visiting http://alteredqualia.com/tools/webgl-features/ BUG=605754 Change-Id: If654c34adcebb4cd3eaa994ad7e912f6ffa4df55 Reviewed-on: https://chromium-review.googlesource.com/376281 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>