Remove parts of //cc we aren't using

cc/resources/picture_pile.h

Index: cc/resources/picture_pile.h
diff --git a/cc/resources/picture_pile.h b/cc/resources/picture_pile.h
deleted file mode 100644
index f3c956960b5b5c5a384f770cce42265b5f617d20..0000000000000000000000000000000000000000
--- a/cc/resources/picture_pile.h
+++ /dev/null
@@ -1,138 +0,0 @@
-// 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 <utility>
-#include <vector>
-
-#include "base/containers/hash_tables.h"
-#include "base/memory/ref_counted.h"
-#include "cc/base/tiling_data.h"
-#include "cc/resources/picture.h"
-
-namespace cc {
-class PicturePileImpl;
-
-class CC_EXPORT PicturePile : public RecordingSource {
- public:
-  PicturePile(float min_contents_scale, const gfx::Size& tile_grid_size);
-  ~PicturePile() override;
-
-  // RecordingSource overrides.
-  bool UpdateAndExpandInvalidation(ContentLayerClient* painter,
-                                   Region* invalidation,
-                                   const gfx::Size& layer_size,
-                                   const gfx::Rect& visible_layer_rect,
-                                   int frame_number,
-                                   RecordingMode recording_mode) override;
-  void DidMoveToNewCompositor() override;
-  scoped_refptr<RasterSource> CreateRasterSource(
-      bool can_use_lcd_text) const override;
-  gfx::Size GetSize() const final;
-  void SetEmptyBounds() override;
-  void SetSlowdownRasterScaleFactor(int factor) override;
-  void SetGatherPixelRefs(bool gather_pixel_refs) override;
-  void SetBackgroundColor(SkColor background_color) override;
-  void SetRequiresClear(bool requires_clear) override;
-  bool IsSuitableForGpuRasterization() const override;
-  void SetUnsuitableForGpuRasterizationForTesting() override;
-  gfx::Size GetTileGridSizeForTesting() const override;
-
- 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();
-    }
-
-    void ResetInvalidationHistory();
-
-   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();
-
-  void SetMinContentsScale(float min_contents_scale);
-  void SetTileGridSize(const gfx::Size& tile_grid_size);
-
-  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_;
-  gfx::Size tile_grid_size_;
-  int slow_down_raster_scale_factor_for_debug_;
-  bool gather_pixel_refs_;
-  // A hint about whether there are any recordings. This may be a false
-  // positive.
-  bool has_any_recordings_;
-  bool clear_canvas_with_debug_color_;
-  bool requires_clear_;
-  bool is_solid_color_;
-  SkColor solid_color_;
-  SkColor background_color_;
-  int pixel_record_distance_;
-
- private:
-  friend class PicturePileImpl;
-
-  void CreatePictures(ContentLayerClient* painter,
-                      RecordingMode recording_mode,
-                      const std::vector<gfx::Rect>& record_rects);
-  void GetInvalidTileRects(const gfx::Rect& interest_rect,
-                           Region* invalidation,
-                           const gfx::Rect& visible_layer_rect,
-                           int frame_number,
-                           std::vector<gfx::Rect>* invalid_tiles);
-  bool ApplyInvalidationAndResize(const gfx::Rect& interest_rect,
-                                  Region* invalidation,
-                                  const gfx::Size& layer_size,
-                                  int frame_number);
-  void DetermineIfSolidColor();
-  void SetBufferPixels(int buffer_pixels);
-
-  bool is_suitable_for_gpu_rasterization_;
-
-  DISALLOW_COPY_AND_ASSIGN(PicturePile);
-};
-
-}  // namespace cc
-
-#endif  // CC_RESOURCES_PICTURE_PILE_H_