Moved StartPageForVectorCanvas from Metafile to PdfMetafileSkia.

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 "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "build/build_config.h"
 #include "printing/metafile.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
+class SkBaseDevice;
+
 #if defined(OS_CHROMEOS) || defined(OS_ANDROID)
 namespace base {
 struct FileDescriptor;
 }
 #endif
 
 namespace printing {
 
 struct PdfMetafileSkiaData;
 
 // This class uses Skia graphics library to generate a PDF document.
 class PRINTING_EXPORT PdfMetafileSkia : public Metafile {
  public:
   PdfMetafileSkia();
   ~PdfMetafileSkia() override;
 
   // Metafile methods.
   bool Init() override;
   bool InitFromData(const void* src_buffer, uint32 src_buffer_size) override;
 
-  SkBaseDevice* StartPageForVectorCanvas(const gfx::Size& page_size,
-                                         const gfx::Rect& content_area,
-                                         const float& scale_factor) override;
-
   bool StartPage(const gfx::Size& page_size,
                  const gfx::Rect& content_area,
                  const float& scale_factor) override;
   bool FinishPage() override;
   bool FinishDocument() override;
 
   uint32 GetDataSize() const override;
   bool GetData(void* dst_buffer, uint32 dst_buffer_size) const override;
 
   gfx::Rect GetPageBounds(unsigned int page_number) const override;
@@ skipping 13 matching lines @@
 #endif
 
 #if defined(OS_CHROMEOS) || defined(OS_ANDROID)
   // TODO(vitalybuka): replace with SaveTo().
   bool SaveToFD(const base::FileDescriptor& fd) const;
 #endif  // if defined(OS_CHROMEOS) || defined(OS_ANDROID)
 
   // Return a new metafile containing just the current page in draft mode.
   scoped_ptr<PdfMetafileSkia> GetMetafileForCurrentPage();
 
+  // This method calls StartPage and then returns an appropriate
+  // VectorPlatformDevice implementation bound to the context created by
+  // StartPage or NULL on error.
+  SkBaseDevice* StartPageForVectorCanvas(const gfx::Size& page_size,
+                                         const gfx::Rect& content_area,
+                                         const float& scale_factor);
  private:
   scoped_ptr<PdfMetafileSkiaData> data_;
 
   // True when finish page is outstanding for current page.
   bool page_outstanding_;
 
   DISALLOW_COPY_AND_ASSIGN(PdfMetafileSkia);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PDF_METAFILE_SKIA_H_