Remove GrContextPriv.h from GrRenderTargetContext.h

Change-Id: Ib3afe6d8f2f9607eededb4dd4ef9dbe305741cfb
Reviewed-on: https://skia-review.googlesource.com/c/192829
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/ops/GrDefaultPathRenderer.cpp b/src/gpu/ops/GrDefaultPathRenderer.cpp
index 87ffadb..7b50162 100644
--- a/src/gpu/ops/GrDefaultPathRenderer.cpp
+++ b/src/gpu/ops/GrDefaultPathRenderer.cpp
@@ -6,6 +6,8 @@
  */
 
 #include "GrDefaultPathRenderer.h"
+
+#include "GrCaps.h"
 #include "GrDefaultGeoProcFactory.h"
 #include "GrDrawOpTest.h"
 #include "GrFillRectOp.h"