Have GrSurfaceProxys and GrGpuResources draw from the same pool of unique ids

src/gpu/batches/GrCopySurfaceBatch.h

Index: src/gpu/batches/GrCopySurfaceBatch.h
diff --git a/src/gpu/batches/GrCopySurfaceBatch.h b/src/gpu/batches/GrCopySurfaceBatch.h
index 05b30b24b0e1b7314e11ac21919a58c4246cf033..fea8aae2f3c53956a67c7842b1d0af2380d5100d 100644
--- a/src/gpu/batches/GrCopySurfaceBatch.h
+++ b/src/gpu/batches/GrCopySurfaceBatch.h
@@ -34,7 +34,7 @@ public:
 
     uint32_t renderTargetUniqueID() const override {
         GrRenderTarget* rt = fDst.get()->asRenderTarget();
-        return rt ? rt->getUniqueID() : 0;
+        return rt ? rt->uniqueID() : 0;
     }
     GrRenderTarget* renderTarget() const override { return nullptr; }