Changes the pointer from textures to their renderbuffer proxies to non-refcounted (2/2) TRAC #19335 Issue=271 Instead, the texture maintains an internal refcount which causes the pointer to behave kind of like a "weak" shared pointer-- its reference won't prevent the renderbuffer from being deleted, but if the renderbuffer's refcount drops to zero, the texture should set its pointer to the renderbuffer to null so that a new one can be created at the next getRenderbuffer call. Signed-off-by: Nicolas Capens Signed-off-by: Daniel Koch git-svn-id: https://angleproject.googlecode.com/svn/trunk@948 736b8ea6-26fd-11df-bfd4-992fa37f6226