Update from https://crrev.com/306655

cc/resources/display_item.h

+// 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.
+
+#ifndef CC_RESOURCES_DISPLAY_ITEM_H_
+#define CC_RESOURCES_DISPLAY_ITEM_H_
+
+#include "base/memory/scoped_ptr.h"
+#include "cc/base/cc_export.h"
+#include "ui/gfx/rect.h"
+
+class SkCanvas;
+class SkDrawPictureCallback;
+
+namespace cc {
+
+class CC_EXPORT DisplayItem {
+ public:
+  virtual ~DisplayItem() {}
+
+  virtual void Raster(SkCanvas* canvas,
+                      SkDrawPictureCallback* callback) const = 0;
+
+  virtual bool IsSuitableForGpuRasterization() const = 0;
+  virtual int ApproximateOpCount() const = 0;
+  virtual size_t PictureMemoryUsage() const = 0;
+
+ protected:
+  DisplayItem();
+};
+
+}  // namespace cc
+
+#endif  // CC_RESOURCES_DISPLAY_ITEM_H_