store info in basedevice, change getter to non-virtual const&

src/svg/SkSVGDevice.h

Index: src/svg/SkSVGDevice.h
diff --git a/src/svg/SkSVGDevice.h b/src/svg/SkSVGDevice.h
index bf86e15c5125abd69b52a858a56e09ac52223a2a..cb13ffdc8c030458500860fd25a24e96af891a42 100644
--- a/src/svg/SkSVGDevice.h
+++ b/src/svg/SkSVGDevice.h
@@ -17,8 +17,6 @@ class SkSVGDevice : public SkBaseDevice {
 public:
     static SkBaseDevice* Create(const SkISize& size, SkXMLWriter* writer);
 
-    SkImageInfo imageInfo() const override;
-
 protected:
     void drawPaint(const SkDraw&, const SkPaint& paint) override;
     void drawPoints(const SkDraw&, SkCanvas::PointMode mode, size_t count,
@@ -68,7 +66,6 @@ private:
     SkXMLWriter*                  fWriter;
     SkAutoTDelete<AutoElement>    fRootElement;
     SkAutoTDelete<ResourceBucket> fResourceBucket;
-    SkISize                       fSize;
 
     typedef SkBaseDevice INHERITED;
 };