Make GrGLDefines.h be a private header

[bsalomon, 2012-05-07 17:22:32]

There's no reason for clients to be using our copy of GL macros. We add and
delete from here at will so no one should rely on this being stable.

[bsalomon, 2012-05-07 17:23:23]

On 2012/05/07 17:22:32, bsalomon wrote:
> There's no reason for clients to be using our copy of GL macros. We add and
> delete from here at will so no one should rely on this being stable.

code review isn't showing it, but GrGLDefines.h is moved from include/gpu/gl to
src/gpu/gl.

[TomH, 2012-05-07 17:23:40]

LGTM. Very.

[robertphillips, 2012-05-07 17:26:57]

LGTM

[bsalomon, 2012-05-07 18:15:47]

Closed with r3851,2.