Move metafile printing code from platform canvas to PaintCanvas

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..4bca57fd6af6b57a65bcad1afbeb1e572984b487 100644
--- a/printing/metafile_skia_wrapper.h
+++ b/printing/metafile_skia_wrapper.h
@@ -5,11 +5,10 @@
 #ifndef PRINTING_METAFILE_SKIA_WRAPPER_H_
 #define PRINTING_METAFILE_SKIA_WRAPPER_H_
 
+#include "cc/paint/paint_canvas.h"
 #include "printing/printing_export.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 
-class SkCanvas;
-
 namespace printing {
 
 class PdfMetafileSkia;
@@ -20,10 +19,10 @@ class PdfMetafileSkia;
 // as long as the canvas.
 class PRINTING_EXPORT MetafileSkiaWrapper : public SkRefCnt {
  public:
-  static void SetMetafileOnCanvas(const SkCanvas& canvas,
+  static void SetMetafileOnCanvas(cc::PaintCanvas* canvas,
                                   PdfMetafileSkia* metafile);
 
-  static PdfMetafileSkia* GetMetafileFromCanvas(const SkCanvas& canvas);
+  static PdfMetafileSkia* GetMetafileFromCanvas(cc::PaintCanvas* canvas);
 
  private:
   explicit MetafileSkiaWrapper(PdfMetafileSkia* metafile);