Make op-level texture uploading be GrProxy-based

Change-Id: I898d626eff059fa7c687357b536d09409a174358
Reviewed-on: https://skia-review.googlesource.com/28001
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/GrDrawOpAtlas.h b/src/gpu/GrDrawOpAtlas.h
index 1119e3d..87bd695 100644
--- a/src/gpu/GrDrawOpAtlas.h
+++ b/src/gpu/GrDrawOpAtlas.h
@@ -216,7 +216,7 @@
         void setLastUploadToken(GrDrawOpUploadToken token) { fLastUpload = token; }
         void setLastUseToken(GrDrawOpUploadToken token) { fLastUse = token; }
 
-        void uploadToTexture(GrDrawOp::WritePixelsFn&, GrTexture* texture);
+        void uploadToTexture(GrDrawOp::WritePixelsFn&, GrTextureProxy*);
         void resetRects();
 
     private: