cc: Make PaintCanvas abstract

third_party/WebKit/Source/platform/graphics/paint/DrawingDisplayItem.cpp

 // Copyright 2014 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 "platform/graphics/paint/DrawingDisplayItem.h"
 
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/paint/PaintCanvas.h"
 #include "public/platform/WebDisplayItemList.h"
 #include "third_party/skia/include/core/SkBitmap.h"
@@ skipping 50 matching lines @@
   // TODO(enne): PaintRecord should have an operator==
   sk_sp<SkData> data1 = ToSkPicture(record1)->serialize();
   sk_sp<SkData> data2 = ToSkPicture(record2)->serialize();
   return data1->equals(data2.get());
 }
 
 static SkBitmap recordToBitmap(const PaintRecord* record) {
   SkBitmap bitmap;
   SkRect rect = record->cullRect();
   bitmap.allocPixels(SkImageInfo::MakeN32Premul(rect.width(), rect.height()));
-  PaintCanvas canvas(bitmap);
+  SkiaPaintCanvas canvas(bitmap);
   canvas.clear(SK_ColorTRANSPARENT);
   canvas.translate(-rect.x(), -rect.y());
   canvas.drawPicture(record);
   return bitmap;
 }
 
 static bool bitmapsEqual(const PaintRecord* record1,
                          const PaintRecord* record2) {
   SkRect rect = record1->cullRect();
   if (rect != record2->cullRect())
@@ skipping 36 matching lines @@
 
   if (recordsEqual(record, otherRecord))
     return true;
 
   // Sometimes the client may produce different records for the same visual
   // result, which should be treated as equal.
   return bitmapsEqual(record, otherRecord);
 }
 
 }  // namespace blink