A better fix for scaling issue.

printing/metafile_skia_wrapper.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PRINTING_METAFILE_SKIA_WRAPPER_H_
 #define PRINTING_METAFILE_SKIA_WRAPPER_H_
 
 #include "printing/printing_export.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 
 class SkCanvas;
 
 namespace printing {
 
 class Metafile;
 
 // A wrapper class with static methods to set and retrieve a Metafile
 // on an SkCanvas.  The ownership of the metafile is not affected and it
 // is the caller's responsibility to ensure that the metafile remains valid
 // as long as the canvas.
 class PRINTING_EXPORT MetafileSkiaWrapper : public SkRefCnt {
  public:
   static void SetMetafileOnCanvas(const SkCanvas& canvas, Metafile* metafile);
 
   static Metafile* GetMetafileFromCanvas(const SkCanvas& canvas);
 
+  // Methods to set and retrieve custom scale factor for metafile from canvas.
+  static void SetCustomScaleOnCanvas(const SkCanvas& canvas, double scale);
+  static bool GetCustomScaleOnCanvas(const SkCanvas& canvas, double* scale);
+
  private:
   explicit MetafileSkiaWrapper(Metafile* metafile);
 
   Metafile* metafile_;
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_METAFILE_SKIA_WRAPPER_H_