Update from https://crrev.com/304121

cc/resources/picture_pile_base.h

-// Copyright 2013 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_PICTURE_PILE_BASE_H_
-#define CC_RESOURCES_PICTURE_PILE_BASE_H_
-
-#include <bitset>
-#include <list>
-#include <utility>
-
-#include "base/containers/hash_tables.h"
-#include "cc/base/cc_export.h"
-#include "cc/base/region.h"
-#include "cc/base/tiling_data.h"
-#include "cc/resources/picture.h"
-#include "ui/gfx/geometry/size.h"
-
-namespace base {
-namespace debug {
-class TracedValue;
-}
-class Value;
-}
-
-namespace cc {
-
-class CC_EXPORT PicturePileBase {
- public:
-  PicturePileBase();
-  explicit PicturePileBase(const PicturePileBase* other);
-
-  gfx::Size tiling_size() const { return tiling_.tiling_size(); }
-  void SetMinContentsScale(float min_contents_scale);
-
-  // If non-empty, all pictures tiles inside this rect are recorded. There may
-  // be recordings outside this rect, but everything inside the rect is
-  // recorded.
-  gfx::Rect recorded_viewport() const { return recorded_viewport_; }
-
-  int num_tiles_x() const { return tiling_.num_tiles_x(); }
-  int num_tiles_y() const { return tiling_.num_tiles_y(); }
-  gfx::Rect tile_bounds(int x, int y) const { return tiling_.TileBounds(x, y); }
-  bool HasRecordingAt(int x, int y);
-  bool CanRaster(float contents_scale, const gfx::Rect& content_rect) const;
-
-  // If this pile contains any valid recordings. May have false positives.
-  bool HasRecordings() const { return has_any_recordings_; }
-
-  bool is_solid_color() const { return is_solid_color_; }
-  SkColor solid_color() const { return solid_color_; }
-
-  void set_is_mask(bool is_mask) { is_mask_ = is_mask; }
-  bool is_mask() const { return is_mask_; }
-
-  static void ComputeTileGridInfo(const gfx::Size& tile_grid_size,
-                                  SkTileGridFactory::TileGridInfo* info);
-
-  void SetTileGridSize(const gfx::Size& tile_grid_size);
-  TilingData& tiling() { return tiling_; }
-
-  void AsValueInto(base::debug::TracedValue* array) const;
-
-  SkTileGridFactory::TileGridInfo GetTileGridInfoForTesting() const {
-    return tile_grid_info_;
-  }
-
- protected:
-  class CC_EXPORT PictureInfo {
-   public:
-    enum {
-      INVALIDATION_FRAMES_TRACKED = 32
-    };
-
-    PictureInfo();
-    ~PictureInfo();
-
-    bool Invalidate(int frame_number);
-    bool NeedsRecording(int frame_number, int distance_to_visible);
-    void SetPicture(scoped_refptr<Picture> picture);
-    const Picture* GetPicture() const;
-
-    float GetInvalidationFrequencyForTesting() const {
-      return GetInvalidationFrequency();
-    }
-
-   private:
-    void AdvanceInvalidationHistory(int frame_number);
-    float GetInvalidationFrequency() const;
-
-    int last_frame_number_;
-    scoped_refptr<const Picture> picture_;
-    std::bitset<INVALIDATION_FRAMES_TRACKED> invalidation_history_;
-  };
-
-  typedef std::pair<int, int> PictureMapKey;
-  typedef base::hash_map<PictureMapKey, PictureInfo> PictureMap;
-
-  virtual ~PicturePileBase();
-
-  int buffer_pixels() const { return tiling_.border_texels(); }
-  void Clear();
-
-  gfx::Rect PaddedRect(const PictureMapKey& key) const;
-  gfx::Rect PadRect(const gfx::Rect& rect) const;
-
-  // An internal CanRaster check that goes to the picture_map rather than
-  // using the recorded_viewport hint.
-  bool CanRasterSlowTileCheck(const gfx::Rect& layer_rect) const;
-
-  // A picture pile is a tiled set of pictures. The picture map is a map of tile
-  // indices to picture infos.
-  PictureMap picture_map_;
-  TilingData tiling_;
-  gfx::Rect recorded_viewport_;
-  float min_contents_scale_;
-  SkTileGridFactory::TileGridInfo tile_grid_info_;
-  SkColor background_color_;
-  int slow_down_raster_scale_factor_for_debug_;
-  bool contents_opaque_;
-  bool contents_fill_bounds_completely_;
-  bool show_debug_picture_borders_;
-  bool clear_canvas_with_debug_color_;
-  // A hint about whether there are any recordings. This may be a false
-  // positive.
-  bool has_any_recordings_;
-  bool is_mask_;
-  bool is_solid_color_;
-  SkColor solid_color_;
-
- private:
-  void SetBufferPixels(int buffer_pixels);
-
-  DISALLOW_COPY_AND_ASSIGN(PicturePileBase);
-};
-
-}  // namespace cc
-
-#endif  // CC_RESOURCES_PICTURE_PILE_BASE_H_