Optimize texture application in draw calls. Gather all bound textures and samplers first and then pass them to generateSwizzles and applyTextures to reduce redundant get calls. BUG=260069 Change-Id: I5b10dddb01a6bfd756c58b76218838cfc1fd59b6 Reviewed-on: https://chromium-review.googlesource.com/199343 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>