PdfMetafileSkia gives out a SkCanvas, not a SkBaseDevice.

android_webview/renderer/print_web_view_helper_linux.cc

 // Copyright 2013 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.
 
 // TODO(sgurun) copied from chrome/renderer. Remove after crbug.com/322276
 
 #include "android_webview/renderer/print_web_view_helper.h"
 
 #include "android_webview/common/print_messages.h"
 #include "base/logging.h"
@@ skipping 148 matching lines @@
   ComputePageLayoutInPointsForCss(frame, params.page_number, params.params,
                                   ignore_css_margins_, &scale_factor,
                                   &page_layout_in_points);
   gfx::Size page_size;
   gfx::Rect content_area;
   GetPageSizeAndContentAreaFromPageLayout(page_layout_in_points, &page_size,
                                           &content_area);
   gfx::Rect canvas_area =
       params.params.display_header_footer ? gfx::Rect(page_size) : content_area;
 
-  SkBaseDevice* device = metafile->StartPageForVectorCanvas(page_size,
-                                                            canvas_area,
-                                                            scale_factor);
-  if (!device)
+  skia::VectorCanvas* canvas = metafile->GetVectorCanvasForNewPage(
+      page_size, canvas_area, scale_factor);
+  if (!canvas)
     return;
 
-  // The printPage method take a reference to the canvas we pass down, so it
-  // can't be a stack object.
-  skia::RefPtr<skia::VectorCanvas> canvas =
-      skia::AdoptRef(new skia::VectorCanvas(device));
   MetafileSkiaWrapper::SetMetafileOnCanvas(*canvas, metafile);
   skia::SetIsDraftMode(*canvas, is_print_ready_metafile_sent_);
 
   if (params.params.display_header_footer) {
     // |page_number| is 0-based, so 1 is added.
     // TODO(vitalybuka) : why does it work only with 1.25?
-    PrintHeaderAndFooter(canvas.get(), params.page_number + 1,
+    PrintHeaderAndFooter(canvas, params.page_number + 1,
                          print_preview_context_.total_page_count(),
                          scale_factor / 1.25,
                          page_layout_in_points, *header_footer_info_,
                          params.params);
   }
   RenderPageContent(frame, params.page_number, canvas_area, content_area,
-                    scale_factor, canvas.get());
+                    scale_factor, canvas);
 
-  // Done printing. Close the device context to retrieve the compiled metafile.
+  // Done printing. Close the canvas to retrieve the compiled metafile.
   if (!metafile->FinishPage())
     NOTREACHED() << "metafile failed";
 }
 
 }  // namespace printing