Move functions from SkGr to SkGrPriv.h

Review URL: https://codereview.chromium.org/1397123002
diff --git a/src/gpu/GrSurface.cpp b/src/gpu/GrSurface.cpp
index a7be0f4..382550e 100644
--- a/src/gpu/GrSurface.cpp
+++ b/src/gpu/GrSurface.cpp
@@ -6,10 +6,11 @@
  */
 
 #include "GrSurface.h"
+#include "GrContext.h"
 #include "GrSurfacePriv.h"
 
 #include "SkBitmap.h"
-#include "SkGr.h"
+#include "SkGrPriv.h"
 #include "SkImageEncoder.h"
 #include <stdio.h>