Move metafile printing code from platform canvas to PaintCanvas

components/printing/renderer/print_web_view_helper.cc

 // 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.
 
 #include "components/printing/renderer/print_web_view_helper.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 1871 matching lines @@
 
   // TODO(thestig): Figure out why Linux is different.
 #if defined(OS_WIN)
   float webkit_page_shrink_factor =
       frame->getPrintPageShrink(params.page_number);
   float scale_factor = css_scale_factor * webkit_page_shrink_factor;
 #else
   float scale_factor = css_scale_factor;
 #endif
 
   SkCanvas* canvas = metafile->GetVectorCanvasForNewPage(

[danakj, 2017/02/09 23:05:22]

This is a PaintCanvas right?

       page_size, canvas_area, scale_factor);
   if (!canvas)
     return;
 
-  MetafileSkiaWrapper::SetMetafileOnCanvas(*canvas, metafile);
+  MetafileSkiaWrapper::SetMetafileOnCanvas(canvas, metafile);
 
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   if (params.params.display_header_footer) {
     // TODO(thestig): Figure out why Linux needs this. It is almost certainly
     // |printingMinimumShrinkFactor| from Blink.
 #if defined(OS_WIN)
     const float fudge_factor = 1;
 #else
     const float fudge_factor = kPrintingMinimumShrinkFactor;
 #endif
@@ skipping 452 matching lines @@
       blink::WebConsoleMessage::LevelWarning, message));
   return false;
 }
 
 void PrintWebViewHelper::ScriptingThrottler::Reset() {
   // Reset counter on successful print.
   count_ = 0;
 }
 
 }  // namespace printing