Move metafile printing code from platform canvas to PaintCanvas

printing/metafile_skia_wrapper.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 "printing/metafile_skia_wrapper.h"
-#include "skia/ext/platform_canvas.h"
 #include "third_party/skia/include/core/SkMetaData.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 
 namespace printing {
 
 namespace {
 
 const char kMetafileKey[] = "CrMetafile";
 
 }  // namespace
 
 // static
-void MetafileSkiaWrapper::SetMetafileOnCanvas(const SkCanvas& canvas,
+void MetafileSkiaWrapper::SetMetafileOnCanvas(cc::PaintCanvas* canvas,
                                               PdfMetafileSkia* metafile) {
   sk_sp<MetafileSkiaWrapper> wrapper;
   // Can't use sk_make_sp<>() because the constructor is private.
   if (metafile)
     wrapper = sk_sp<MetafileSkiaWrapper>(new MetafileSkiaWrapper(metafile));
 
-  SkMetaData& meta = skia::GetMetaData(canvas);
+  SkMetaData& meta = canvas->getMetaData();
   meta.setRefCnt(kMetafileKey, wrapper.get());
 }
 
 // static
 PdfMetafileSkia* MetafileSkiaWrapper::GetMetafileFromCanvas(
-    const SkCanvas& canvas) {
-  SkMetaData& meta = skia::GetMetaData(canvas);
+    cc::PaintCanvas* canvas) {
+  SkMetaData& meta = canvas->getMetaData();
   SkRefCnt* value;
   if (!meta.findRefCnt(kMetafileKey, &value) || !value)
     return nullptr;
 
   return static_cast<MetafileSkiaWrapper*>(value)->metafile_;
 }
 
 MetafileSkiaWrapper::MetafileSkiaWrapper(PdfMetafileSkia* metafile)
     : metafile_(metafile) {
 }
 
 }  // namespace printing