Move metafile printing code from platform canvas to PaintCanvas

printing/pdf_metafile_skia.h

 // Copyright (c) 2012 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_PDF_METAFILE_SKIA_H_
 #define PRINTING_PDF_METAFILE_SKIA_H_
 
 #include <stdint.h>
 
 #include <memory>
 
 #include "base/macros.h"
 #include "build/build_config.h"
+#include "cc/paint/paint_canvas.h"
 #include "printing/metafile.h"
 #include "skia/ext/platform_canvas.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
-class SkCanvas;
-
 namespace printing {
 
 enum SkiaDocumentType {
   PDF_SKIA_DOCUMENT_TYPE,
   // MSKP is an experimental, fragile, and diagnostic-only document type.
   MSKP_SKIA_DOCUMENT_TYPE,
 };
 
 struct PdfMetafileSkiaData;
 
@@ skipping 33 matching lines @@
 #endif
 
   bool SaveTo(base::File* file) const override;
 
   // Return a new metafile containing just the current page in draft mode.
   std::unique_ptr<PdfMetafileSkia> GetMetafileForCurrentPage(
       SkiaDocumentType type);
 
   // This method calls StartPage and then returns an appropriate
   // PlatformCanvas implementation bound to the context created by
-  // StartPage or NULL on error.  The SkCanvas pointer that
+  // StartPage or NULL on error.  The PaintCanvas pointer that
   // is returned is owned by this PdfMetafileSkia object and does not
   // need to be ref()ed or unref()ed.  The canvas will remain valid
   // until FinishPage() or FinishDocument() is called.
-  SkCanvas* GetVectorCanvasForNewPage(const gfx::Size& page_size,
-                                      const gfx::Rect& content_area,
-                                      const float& scale_factor);
+  cc::PaintCanvas* GetVectorCanvasForNewPage(const gfx::Size& page_size,
+                                             const gfx::Rect& content_area,
+                                             const float& scale_factor);
 
  private:
   std::unique_ptr<PdfMetafileSkiaData> data_;
 
   DISALLOW_COPY_AND_ASSIGN(PdfMetafileSkia);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PDF_METAFILE_SKIA_H_