Fix initialization of Caps members. sRGB was never initialized and maxTextureAnisotropy was initialized with a bool instead of a float. BUG=602737 Change-Id: Ied7c27d1dbdbec96f8aead618132b4f59892bd99 Reviewed-on: https://chromium-review.googlesource.com/442668 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Geoff Lang <geofflang@chromium.org>