Context init should set DIRTY_BIT_DRAW_FRAMEBUFFER_BINDING Bug: angleproject:2685 Bug: angleproject:2597 Bug: angleproject:2687 Change-Id: I4cab6b70c3eae26b827cbbd00ecbfa8b4eddcd7c Reviewed-on: https://chromium-review.googlesource.com/1114779 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Luc Ferron <lucferron@chromium.org>