Make drawImage a virtual on SkDevice

src/gpu/SkGpuDevice.h

Index: src/gpu/SkGpuDevice.h
diff --git a/src/gpu/SkGpuDevice.h b/src/gpu/SkGpuDevice.h
index 30cf68daa8ad565c086f148eab86558de5d3d2d1..89959e1f9cf8c1c9e94b5c5e4bb05316c3e4d102 100644
--- a/src/gpu/SkGpuDevice.h
+++ b/src/gpu/SkGpuDevice.h
@@ -115,6 +115,9 @@ public:
                               const SkPaint&) override;
     virtual void drawDevice(const SkDraw&, SkBaseDevice*, int x, int y,
                             const SkPaint&) override;
+    void drawImage(const SkDraw&, const SkImage*, SkScalar x, SkScalar y, const SkPaint&) override;
+    void drawImageRect(const SkDraw&, const SkImage*, const SkRect* src, const SkRect& dst,
+                       const SkPaint&) override;
 
     void flush() override;