Remove dependence on platform GL headers. Remove code that attempts to infer GL function pointers on various platforms. Instead add platform-specific implementations for Windows and Mac. (GLX coming)

Review URL: http://codereview.appspot.com/4354048/

git-svn-id: http://skia.googlecode.com/svn/trunk@1045 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/include/GrGLIndexBuffer.h b/gpu/include/GrGLIndexBuffer.h
index 92aadcf..3565059 100644
--- a/gpu/include/GrGLIndexBuffer.h
+++ b/gpu/include/GrGLIndexBuffer.h
@@ -19,7 +19,7 @@
 #define GrGLIndexBuffer_DEFINED
 
 #include "GrIndexBuffer.h"
-#include "GrGLConfig.h"
+#include "GrGLInterface.h"
 
 class GrGpuGL;