This CL removes all dependencies on GL headers across all of Ganesh.  New
GrGLint, etc. types are introduced, and new GR_GL_XXXX constants for use at all
GL call-sites.

Review:  http://codereview.appspot.com/4272061/



git-svn-id: http://skia.googlecode.com/svn/trunk@959 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrGLUtil.cpp b/gpu/src/GrGLUtil.cpp
index 2cb887a..8b68845 100644
--- a/gpu/src/GrGLUtil.cpp
+++ b/gpu/src/GrGLUtil.cpp
@@ -18,7 +18,7 @@
 
 void GrGLCheckErr(const char* location, const char* call) {
     uint32_t err =  GrGLGetGLInterface()->fGetError();
-    if (GL_NO_ERROR != err) {
+    if (GR_GL_NO_ERROR != err) {
         GrPrintf("---- glGetError %x", err);
         if (NULL != location) {
             GrPrintf(" at\n\t%s", location);