store MetafileSkiaWrapper in plugin instead of canvas

printing/metafile_skia_wrapper.h

Index: printing/metafile_skia_wrapper.h
diff --git a/printing/metafile_skia_wrapper.h b/printing/metafile_skia_wrapper.h
index 6236e85a4c4c5e372009b7c237b94c01648212eb..1ad72223d4a5e8718098f196b6350f2a247075b3 100644
--- a/printing/metafile_skia_wrapper.h
+++ b/printing/metafile_skia_wrapper.h
@@ -23,7 +23,9 @@ class PRINTING_EXPORT MetafileSkiaWrapper : public SkRefCnt {
   static void SetMetafileOnCanvas(const SkCanvas& canvas,
                                   PdfMetafileSkia* metafile);
 
-  static PdfMetafileSkia* GetMetafileFromCanvas(const SkCanvas& canvas);
+  static sk_sp<MetafileSkiaWrapper> RefFromCanvas(const SkCanvas& canvas);
+
+  PdfMetafileSkia* getMetafile() const { return metafile_; }

[Lei Zhang, 2016/11/18 01:53:37]

nit: GetMetafile(), or just metafile() since it's a simple accessor.

 
  private:
   explicit MetafileSkiaWrapper(PdfMetafileSkia* metafile);