* Expose GL_CHROMIUM_color_buffer_float_rgb and
GL_CHROMIUM_color_buffer_float_rgba
* Fix many texture formats that were incorrectly checking the wrong
extension for support or renderability.
* Make all floating point texture extensions dynamically enableable.
BUG=angleproject:1958
BUG=angleproject:1715
Change-Id: Iefccc8b5ae5edd97623affa9de05b1d9af5c9598
Reviewed-on: https://chromium-review.googlesource.com/468450Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
