Remove SkDevice::accessRenderTarget virtual
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2167723002

Review-Url: https://codereview.chromium.org/2167723002
diff --git a/src/image/SkImage_Gpu.cpp b/src/image/SkImage_Gpu.cpp
index 7c08b13..de67d6c 100644
--- a/src/image/SkImage_Gpu.cpp
+++ b/src/image/SkImage_Gpu.cpp
@@ -38,7 +38,7 @@
 }
 
 extern void SkTextureImageApplyBudgetedDecision(SkImage* image) {
-    if (as_IB(image)->peekTexture()) {
+    if (image->isTextureBacked()) {
         ((SkImage_Gpu*)image)->applyBudgetDecision();
     }
 }