skia: Fix command buffer support on the mac
The extension on the mac is .dylib, updated the name.
EGL.h isn't available on mac (unless we include skia_angle.h).
I've got a somewhat bad hack of defining the types that I need
to get this running.
GetProcedureAddress was somehow successfully grabbing gl
functions from another lib. Removed this call, I copied it
from ANGLE impl, but it isn't required.
lib load path works differently, fixed in GYP
BUG=skia:2992
Review URL: https://codereview.chromium.org/1403153002
2 files changed
