Rename GrProgramResource to GrGpuResourceRef

BUG=skia:2889
R=robertphillips@google.com

Author: bsalomon@google.com

Review URL: https://codereview.chromium.org/574333003
diff --git a/src/gpu/GrRODrawState.cpp b/src/gpu/GrRODrawState.cpp
index 26edb18..4d35684 100644
--- a/src/gpu/GrRODrawState.cpp
+++ b/src/gpu/GrRODrawState.cpp
@@ -14,7 +14,7 @@
 
 GrRODrawState::GrRODrawState(const GrRODrawState& drawState) : INHERITED() {
     fRenderTarget.setResource(SkSafeRef(drawState.fRenderTarget.getResource()),
-                              GrProgramResource::kWrite_IOType);
+                              GrGpuResourceRef::kWrite_IOType);
 }
 
 bool GrRODrawState::isEqual(const GrRODrawState& that) const {