Plumb the use of GrBackendRenderTarget throughout Skia

Bug: skia:
Change-Id: Ib99a58d9552f5c7b8d77c09dcc72fa88326c26aa
Reviewed-on: https://skia-review.googlesource.com/14148
Reviewed-by: Brian Salomon <bsalomon@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
diff --git a/tools/gpu/GrTest.cpp b/tools/gpu/GrTest.cpp
index 2e34d2f..c7751ec 100644
--- a/tools/gpu/GrTest.cpp
+++ b/tools/gpu/GrTest.cpp
@@ -359,7 +359,8 @@
         return nullptr;
     }
 
-    sk_sp<GrRenderTarget> onWrapBackendRenderTarget(const GrBackendRenderTargetDesc&) override {
+    sk_sp<GrRenderTarget> onWrapBackendRenderTarget(const GrBackendRenderTarget&,
+                                                    GrSurfaceOrigin) override {
         return nullptr;
     }