Check for OpenGL ES support when creating context Support for an OpenGL ES version can come either through OpenGL ES, OpenGL core or available extensions. The context creation should fail if the requested OpenGL ES version is not supported. BUG=angleproject:1477 TEST=angle_end2end_tests Change-Id: I810d004a1bd62f75f162d775d3cf92c4283252a3 Reviewed-on: https://chromium-review.googlesource.com/374338 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>