Revert of Back PaintRecord with PaintOpBuffer instead of SkPicture

cc/test/test_skcanvas.h

-// Copyright 2017 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 CC_TEST_TEST_SKCANVAS_H_
-#define CC_TEST_TEST_SKCANVAS_H_
-
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/utils/SkNoDrawCanvas.h"
-
-namespace cc {
-
-class SaveCountingCanvas : public SkNoDrawCanvas {
- public:
-  SaveCountingCanvas();
-
-  // Note: getSaveLayerStrategy is used as "willSave", as willSave
-  // is not always called.
-  SaveLayerStrategy getSaveLayerStrategy(const SaveLayerRec& rec) override;
-  void willRestore() override;
-  void onDrawRect(const SkRect& rect, const SkPaint& paint) override;
-
-  int save_count_ = 0;
-  int restore_count_ = 0;
-  SkRect draw_rect_;
-  SkPaint paint_;
-};
-
-}  // namespace cc
-
-#endif  // CC_TEST_TEST_SKCANVAS_H_