Update from https://crrev.com/304121

cc/resources/picture_pile.h

 // Copyright 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.
 
 #ifndef CC_RESOURCES_PICTURE_PILE_H_
 #define CC_RESOURCES_PICTURE_PILE_H_
 
+#include <bitset>
+
 #include "base/memory/ref_counted.h"
-#include "cc/resources/picture_pile_base.h"
-#include "ui/gfx/geometry/rect.h"
+#include "cc/base/tiling_data.h"
+#include "cc/resources/recording_source.h"
 
 namespace cc {
 class PicturePileImpl;
-class Region;
-class RenderingStatsInstrumentation;
 
-class CC_EXPORT PicturePile : public PicturePileBase {
+class CC_EXPORT PicturePile : public RecordingSource {
  public:
   PicturePile();
   ~PicturePile() override;
 
-  // Re-record parts of the picture that are invalid.
-  // Invalidations are in layer space, and will be expanded to cover everything
-  // that was either recorded/changed or that has no recording, leaving out only
-  // pieces that we had a recording for and it was not changed.
-  // Return true iff the pile was modified.
+  // RecordingSource overrides.
   bool UpdateAndExpandInvalidation(
       ContentLayerClient* painter,
       Region* invalidation,
       SkColor background_color,
       bool contents_opaque,
       bool contents_fill_bounds_completely,
       const gfx::Size& layer_size,
       const gfx::Rect& visible_layer_rect,
       int frame_number,
-      Picture::RecordingMode recording_mode,
-      RenderingStatsInstrumentation* stats_instrumentation);
+      Picture::RecordingMode recording_mode) override;
+  gfx::Size GetSize() const final;
+  void SetEmptyBounds() override;
+  void SetMinContentsScale(float min_contents_scale) override;
+  void SetTileGridSize(const gfx::Size& tile_grid_size) override;
+  void SetSlowdownRasterScaleFactor(int factor) override;
+  void SetIsMask(bool is_mask) override;
+  bool IsSuitableForGpuRasterization() const override;
+  scoped_refptr<RasterSource> CreateRasterSource() const override;
+  void SetUnsuitableForGpuRasterizationForTesting() override;
+  SkTileGridFactory::TileGridInfo GetTileGridInfoForTesting() const override;
 
-  void SetEmptyBounds();
+  static void ComputeTileGridInfo(const gfx::Size& tile_grid_size,
+                                  SkTileGridFactory::TileGridInfo* info);
 
-  void set_slow_down_raster_scale_factor(int factor) {
-    slow_down_raster_scale_factor_for_debug_ = factor;
-  }
+ protected:
+  class CC_EXPORT PictureInfo {
+   public:
+    enum { INVALIDATION_FRAMES_TRACKED = 32 };
 
-  void set_show_debug_picture_borders(bool show) {
-    show_debug_picture_borders_ = show;
-  }
+    PictureInfo();
+    ~PictureInfo();
 
-  bool is_suitable_for_gpu_rasterization() const {
-    return is_suitable_for_gpu_rasterization_;
-  }
-  void SetUnsuitableForGpuRasterizationForTesting() {
-    is_suitable_for_gpu_rasterization_ = false;
-  }
+    bool Invalidate(int frame_number);
+    bool NeedsRecording(int frame_number, int distance_to_visible);
+    void SetPicture(scoped_refptr<Picture> picture);
+    const Picture* GetPicture() const;
 
-  void SetPixelRecordDistanceForTesting(int d) { pixel_record_distance_ = d; }
+    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;
+
+  // 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;
+
+  void Clear();
+
+  gfx::Rect PaddedRect(const PictureMapKey& key) const;
+  gfx::Rect PadRect(const gfx::Rect& rect) const;
+
+  int buffer_pixels() const { return tiling_.border_texels(); }
+
+  // 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_;
+
+  // 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_;
+  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 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_;
+  int pixel_record_distance_;
 
  private:
   friend class PicturePileImpl;
 
   void DetermineIfSolidColor();
+  void SetBufferPixels(int buffer_pixels);
 
   bool is_suitable_for_gpu_rasterization_;
-  int pixel_record_distance_;
 
   DISALLOW_COPY_AND_ASSIGN(PicturePile);
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_PICTURE_PILE_H_