Reduce dependence on GrSurface's origin field (take 2)

TBR=bsalomon@google.com
Change-Id: Ia238fc66b0fe10a3626c7967b2ac1f1a4bf4cd71
Reviewed-on: https://skia-review.googlesource.com/25800
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/GrSoftwarePathRenderer.cpp b/src/gpu/GrSoftwarePathRenderer.cpp
index 2199529..f479a48 100644
--- a/src/gpu/GrSoftwarePathRenderer.cpp
+++ b/src/gpu/GrSoftwarePathRenderer.cpp
@@ -205,7 +205,7 @@
 
     sk_sp<GrTextureProxy> proxy;
     if (useCache) {
-        proxy = fResourceProvider->findProxyByUniqueKey(maskKey);
+        proxy = fResourceProvider->findProxyByUniqueKey(maskKey, kTopLeft_GrSurfaceOrigin);
     }
     if (!proxy) {
         SkBackingFit fit = useCache ? SkBackingFit::kExact : SkBackingFit::kApprox;