Remove parts of //cc we aren't using

cc/resources/picture_layer_tiling.h

Index: cc/resources/picture_layer_tiling.h
diff --git a/cc/resources/picture_layer_tiling.h b/cc/resources/picture_layer_tiling.h
deleted file mode 100644
index ea258a3084fe3df5afab1c696d6278cab769a773..0000000000000000000000000000000000000000
--- a/cc/resources/picture_layer_tiling.h
+++ /dev/null
@@ -1,349 +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_LAYER_TILING_H_
-#define CC_RESOURCES_PICTURE_LAYER_TILING_H_
-
-#include <map>
-#include <utility>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/containers/hash_tables.h"
-#include "base/memory/scoped_ptr.h"
-#include "cc/base/cc_export.h"
-#include "cc/base/region.h"
-#include "cc/base/tiling_data.h"
-#include "cc/resources/tile.h"
-#include "cc/resources/tile_priority.h"
-#include "cc/trees/occlusion.h"
-#include "ui/gfx/geometry/rect.h"
-
-namespace base {
-namespace trace_event {
-class TracedValue;
-}
-}
-
-namespace cc {
-
-class PictureLayerTiling;
-class RasterSource;
-
-class CC_EXPORT PictureLayerTilingClient {
- public:
-  // Create a tile at the given content_rect (in the contents scale of the
-  // tiling) This might return null if the client cannot create such a tile.
-  virtual scoped_refptr<Tile> CreateTile(float contents_scale,
-                                         const gfx::Rect& content_rect) = 0;
-  virtual gfx::Size CalculateTileSize(
-    const gfx::Size& content_bounds) const = 0;
-  // This invalidation region defines the area (if any, it can by null) that
-  // tiles can not be shared between pending and active trees.
-  virtual const Region* GetPendingInvalidation() = 0;
-  virtual const PictureLayerTiling* GetPendingOrActiveTwinTiling(
-      const PictureLayerTiling* tiling) const = 0;
-  virtual PictureLayerTiling* GetRecycledTwinTiling(
-      const PictureLayerTiling* tiling) = 0;
-  virtual TilePriority::PriorityBin GetMaxTilePriorityBin() const = 0;
-  virtual WhichTree GetTree() const = 0;
-  virtual bool RequiresHighResToDraw() const = 0;
-
- protected:
-  virtual ~PictureLayerTilingClient() {}
-};
-
-class CC_EXPORT PictureLayerTiling {
- public:
-  static const int kBorderTexels = 1;
-
-  ~PictureLayerTiling();
-
-  static float CalculateSoonBorderDistance(
-      const gfx::Rect& visible_rect_in_content_space,
-      float content_to_screen_scale);
-
-  // Create a tiling with no tiles. CreateTile() must be called to add some.
-  static scoped_ptr<PictureLayerTiling> Create(
-      float contents_scale,
-      scoped_refptr<RasterSource> raster_source,
-      PictureLayerTilingClient* client,
-      size_t max_tiles_for_interest_area,
-      float skewport_target_time_in_seconds,
-      int skewport_extrapolation_limit_in_content_pixels);
-
-  void SetRasterSourceAndResize(scoped_refptr<RasterSource> raster_source);
-  void Invalidate(const Region& layer_invalidation);
-  void SetRasterSourceOnTiles();
-  void CreateMissingTilesInLiveTilesRect();
-
-  void CloneTilesAndPropertiesFrom(const PictureLayerTiling& twin_tiling);
-
-  void set_resolution(TileResolution resolution) { resolution_ = resolution; }
-  TileResolution resolution() const { return resolution_; }
-  void set_can_require_tiles_for_activation(bool can_require_tiles) {
-    can_require_tiles_for_activation_ = can_require_tiles;
-  }
-
-  RasterSource* raster_source() const { return raster_source_.get(); }
-  gfx::Size tiling_size() const { return tiling_data_.tiling_size(); }
-  gfx::Rect live_tiles_rect() const { return live_tiles_rect_; }
-  gfx::Size tile_size() const { return tiling_data_.max_texture_size(); }
-  float contents_scale() const { return contents_scale_; }
-
-  Tile* TileAt(int i, int j) const {
-    TileMap::const_iterator iter = tiles_.find(TileMapKey(i, j));
-    return (iter == tiles_.end()) ? NULL : iter->second.get();
-  }
-
-  void CreateAllTilesForTesting() {
-    SetLiveTilesRect(gfx::Rect(tiling_data_.tiling_size()));
-  }
-
-  const TilingData& TilingDataForTesting() const { return tiling_data_; }
-
-  std::vector<Tile*> AllTilesForTesting() const {
-    std::vector<Tile*> all_tiles;
-    for (TileMap::const_iterator it = tiles_.begin(); it != tiles_.end(); ++it)
-      all_tiles.push_back(it->second.get());
-    return all_tiles;
-  }
-
-  void UpdateAllTilePrioritiesForTesting() {
-    for (TileMap::const_iterator it = tiles_.begin(); it != tiles_.end(); ++it)
-      UpdateTileAndTwinPriority(it->second.get());
-  }
-
-  std::vector<scoped_refptr<Tile>> AllRefTilesForTesting() const {
-    std::vector<scoped_refptr<Tile>> all_tiles;
-    for (TileMap::const_iterator it = tiles_.begin(); it != tiles_.end(); ++it)
-      all_tiles.push_back(it->second);
-    return all_tiles;
-  }
-
-  void SetAllTilesOccludedForTesting() {
-    gfx::Rect viewport_in_layer_space =
-        ScaleToEnclosingRect(current_visible_rect_, 1.0f / contents_scale_);
-    current_occlusion_in_layer_space_ =
-        Occlusion(gfx::Transform(),
-                  SimpleEnclosedRegion(viewport_in_layer_space),
-                  SimpleEnclosedRegion(viewport_in_layer_space));
-  }
-
-  const gfx::Rect& GetCurrentVisibleRectForTesting() const {
-    return current_visible_rect_;
-  }
-
-  bool IsTileOccluded(const Tile* tile) const;
-  bool IsTileRequiredForActivationIfVisible(const Tile* tile) const;
-  bool IsTileRequiredForDrawIfVisible(const Tile* tile) const;
-
-  void UpdateTileAndTwinPriority(Tile* tile) const;
-  TilePriority ComputePriorityForTile(const Tile* tile) const;
-  void UpdateRequiredStateForTile(Tile* tile, WhichTree tree) const;
-  bool has_visible_rect_tiles() const { return has_visible_rect_tiles_; }
-  bool has_skewport_rect_tiles() const { return has_skewport_rect_tiles_; }
-  bool has_soon_border_rect_tiles() const {
-    return has_soon_border_rect_tiles_;
-  }
-  bool has_eventually_rect_tiles() const { return has_eventually_rect_tiles_; }
-
-  const gfx::Rect& current_visible_rect() const {
-    return current_visible_rect_;
-  }
-  const gfx::Rect& current_skewport_rect() const {
-    return current_skewport_rect_;
-  }
-  const gfx::Rect& current_soon_border_rect() const {
-    return current_soon_border_rect_;
-  }
-  const gfx::Rect& current_eventually_rect() const {
-    return current_eventually_rect_;
-  }
-
-  // Iterate over all tiles to fill content_rect.  Even if tiles are invalid
-  // (i.e. no valid resource) this tiling should still iterate over them.
-  // The union of all geometry_rect calls for each element iterated over should
-  // exactly equal content_rect and no two geometry_rects should intersect.
-  class CC_EXPORT CoverageIterator {
-   public:
-    CoverageIterator();
-    CoverageIterator(const PictureLayerTiling* tiling,
-        float dest_scale,
-        const gfx::Rect& rect);
-    ~CoverageIterator();
-
-    // Visible rect (no borders), always in the space of content_rect,
-    // regardless of the contents scale of the tiling.
-    gfx::Rect geometry_rect() const;
-    // Texture rect (in texels) for geometry_rect
-    gfx::RectF texture_rect() const;
-
-    Tile* operator->() const { return current_tile_; }
-    Tile* operator*() const { return current_tile_; }
-
-    CoverageIterator& operator++();
-    operator bool() const { return tile_j_ <= bottom_; }
-
-    int i() const { return tile_i_; }
-    int j() const { return tile_j_; }
-
-   private:
-    const PictureLayerTiling* tiling_;
-    gfx::Rect dest_rect_;
-    float dest_to_content_scale_;
-
-    Tile* current_tile_;
-    gfx::Rect current_geometry_rect_;
-    int tile_i_;
-    int tile_j_;
-    int left_;
-    int top_;
-    int right_;
-    int bottom_;
-
-    friend class PictureLayerTiling;
-  };
-
-  void Reset();
-
-  bool ComputeTilePriorityRects(const gfx::Rect& viewport_in_layer_space,
-                                float ideal_contents_scale,
-                                double current_frame_time_in_seconds,
-                                const Occlusion& occlusion_in_layer_space);
-
-  void GetAllTilesAndPrioritiesForTracing(
-      std::map<const Tile*, TilePriority>* tile_map) const;
-  void AsValueInto(base::trace_event::TracedValue* array) const;
-  size_t GPUMemoryUsageInBytes() const;
-
-  struct RectExpansionCache {
-    RectExpansionCache();
-
-    gfx::Rect previous_start;
-    gfx::Rect previous_bounds;
-    gfx::Rect previous_result;
-    int64 previous_target;
-  };
-
-  static
-  gfx::Rect ExpandRectEquallyToAreaBoundedBy(
-      const gfx::Rect& starting_rect,
-      int64 target_area,
-      const gfx::Rect& bounding_rect,
-      RectExpansionCache* cache);
-
-  bool has_ever_been_updated() const {
-    return visible_rect_history_[0].frame_time_in_seconds != 0.0;
-  }
-
- protected:
-  friend class CoverageIterator;
-  friend class TilingSetRasterQueueAll;
-  friend class TilingSetRasterQueueRequired;
-  friend class TilingSetEvictionQueue;
-
-  typedef std::pair<int, int> TileMapKey;
-  typedef base::hash_map<TileMapKey, scoped_refptr<Tile>> TileMap;
-
-  struct FrameVisibleRect {
-    gfx::Rect visible_rect_in_content_space;
-    double frame_time_in_seconds = 0.0;
-  };
-
-  PictureLayerTiling(float contents_scale,
-                     scoped_refptr<RasterSource> raster_source,
-                     PictureLayerTilingClient* client,
-                     size_t max_tiles_for_interest_area,
-                     float skewport_target_time_in_seconds,
-                     int skewport_extrapolation_limit_in_content_pixels);
-  void SetLiveTilesRect(const gfx::Rect& live_tiles_rect);
-  void VerifyLiveTilesRect(bool is_on_recycle_tree) const;
-  Tile* CreateTile(int i,
-                   int j,
-                   const PictureLayerTiling* twin_tiling,
-                   PictureLayerTiling* recycled_twin);
-  // Returns true if the Tile existed and was removed from the tiling.
-  bool RemoveTileAt(int i, int j, PictureLayerTiling* recycled_twin);
-
-  // Computes a skewport. The calculation extrapolates the last visible
-  // rect and the current visible rect to expand the skewport to where it
-  // would be in |skewport_target_time| seconds. Note that the skewport
-  // is guaranteed to contain the current visible rect.
-  gfx::Rect ComputeSkewport(double current_frame_time_in_seconds,
-                            const gfx::Rect& visible_rect_in_content_space)
-      const;
-
-  // Save the required data for computing tile priorities later.
-  void UpdateTilePriorityRects(float content_to_screen_scale_,
-                               const gfx::Rect& visible_rect_in_content_space,
-                               const gfx::Rect& skewport,
-                               const gfx::Rect& soon_border_rect,
-                               const gfx::Rect& eventually_rect,
-                               const Occlusion& occlusion_in_layer_space);
-
-  void UpdateTilePriorityForTree(Tile* tile, WhichTree tree) const;
-  bool NeedsUpdateForFrameAtTimeAndViewport(
-      double frame_time_in_seconds,
-      const gfx::Rect& viewport_in_layer_space) {
-    return frame_time_in_seconds !=
-               visible_rect_history_[0].frame_time_in_seconds ||
-           viewport_in_layer_space != last_viewport_in_layer_space_;
-  }
-  void UpdateVisibleRectHistory(
-      double frame_time_in_seconds,
-      const gfx::Rect& visible_rect_in_content_space) {
-    visible_rect_history_[1] = visible_rect_history_[0];
-    visible_rect_history_[0].frame_time_in_seconds = frame_time_in_seconds;
-    visible_rect_history_[0].visible_rect_in_content_space =
-        visible_rect_in_content_space;
-    // If we don't have a second history item, set it to the most recent one.
-    if (visible_rect_history_[1].frame_time_in_seconds == 0.0)
-      visible_rect_history_[1] = visible_rect_history_[0];
-  }
-
-  const size_t max_tiles_for_interest_area_;
-  const float skewport_target_time_in_seconds_;
-  const int skewport_extrapolation_limit_in_content_pixels_;
-
-  // Given properties.
-  const float contents_scale_;
-  PictureLayerTilingClient* const client_;
-  scoped_refptr<RasterSource> raster_source_;
-  TileResolution resolution_;
-
-  // Internal data.
-  TilingData tiling_data_;
-  TileMap tiles_;  // It is not legal to have a NULL tile in the tiles_ map.
-  gfx::Rect live_tiles_rect_;
-
-  gfx::Rect last_viewport_in_layer_space_;
-  // State saved for computing velocities based upon finite differences.
-  FrameVisibleRect visible_rect_history_[2];
-
-  bool can_require_tiles_for_activation_;
-
-  // Iteration rects in content space.
-  gfx::Rect current_visible_rect_;
-  gfx::Rect current_skewport_rect_;
-  gfx::Rect current_soon_border_rect_;
-  gfx::Rect current_eventually_rect_;
-  // Other properties used for tile iteration and prioritization.
-  float current_content_to_screen_scale_;
-  Occlusion current_occlusion_in_layer_space_;
-
-  bool has_visible_rect_tiles_;
-  bool has_skewport_rect_tiles_;
-  bool has_soon_border_rect_tiles_;
-  bool has_eventually_rect_tiles_;
-
- private:
-  DISALLOW_ASSIGN(PictureLayerTiling);
-
-  RectExpansionCache expansion_cache_;
-};
-
-}  // namespace cc
-
-#endif  // CC_RESOURCES_PICTURE_LAYER_TILING_H_