Remove parts of //cc we aren't using

cc/trees/layer_tree_impl.h

Index: cc/trees/layer_tree_impl.h
diff --git a/cc/trees/layer_tree_impl.h b/cc/trees/layer_tree_impl.h
deleted file mode 100644
index a8c58d1c520634d611ba0992897c825105774bd1..0000000000000000000000000000000000000000
--- a/cc/trees/layer_tree_impl.h
+++ /dev/null
@@ -1,428 +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_TREES_LAYER_TREE_IMPL_H_
-#define CC_TREES_LAYER_TREE_IMPL_H_
-
-#include <set>
-#include <string>
-#include <vector>
-
-#include "base/containers/hash_tables.h"
-#include "base/values.h"
-#include "cc/base/scoped_ptr_vector.h"
-#include "cc/base/synced_property.h"
-#include "cc/input/layer_selection_bound.h"
-#include "cc/layers/layer_impl.h"
-#include "cc/output/begin_frame_args.h"
-#include "cc/output/renderer.h"
-#include "cc/output/swap_promise.h"
-#include "cc/resources/ui_resource_client.h"
-#include "cc/trees/layer_tree_host_impl.h"
-
-namespace base {
-namespace trace_event {
-class TracedValue;
-}
-}
-
-namespace cc {
-
-class ContextProvider;
-class DebugRectHistory;
-class FrameRateCounter;
-class HeadsUpDisplayLayerImpl;
-class LayerScrollOffsetDelegateProxy;
-class LayerTreeDebugState;
-class LayerTreeImpl;
-class LayerTreeSettings;
-class MemoryHistory;
-class OutputSurface;
-class PageScaleAnimation;
-class PaintTimeCounter;
-class PictureLayerImpl;
-class Proxy;
-class ResourceProvider;
-class TileManager;
-class UIResourceRequest;
-struct PendingPageScaleAnimation;
-struct RendererCapabilities;
-struct SelectionHandle;
-
-typedef std::vector<UIResourceRequest> UIResourceRequestQueue;
-typedef SyncedProperty<AdditionGroup<float>> SyncedTopControls;
-typedef SyncedProperty<AdditionGroup<gfx::Vector2dF>> SyncedElasticOverscroll;
-
-class CC_EXPORT LayerTreeImpl {
- public:
-  static scoped_ptr<LayerTreeImpl> create(
-      LayerTreeHostImpl* layer_tree_host_impl,
-      scoped_refptr<SyncedProperty<ScaleGroup>> page_scale_factor,
-      scoped_refptr<SyncedTopControls> top_controls_shown_ratio,
-      scoped_refptr<SyncedElasticOverscroll> elastic_overscroll) {
-    return make_scoped_ptr(
-        new LayerTreeImpl(layer_tree_host_impl, page_scale_factor,
-                          top_controls_shown_ratio, elastic_overscroll));
-  }
-  virtual ~LayerTreeImpl();
-
-  void Shutdown();
-  void ReleaseResources();
-  void RecreateResources();
-
-  // Methods called by the layer tree that pass-through or access LTHI.
-  // ---------------------------------------------------------------------------
-  const LayerTreeSettings& settings() const;
-  const LayerTreeDebugState& debug_state() const;
-  const RendererCapabilitiesImpl& GetRendererCapabilities() const;
-  ContextProvider* context_provider() const;
-  OutputSurface* output_surface() const;
-  ResourceProvider* resource_provider() const;
-  TileManager* tile_manager() const;
-  FrameRateCounter* frame_rate_counter() const;
-  PaintTimeCounter* paint_time_counter() const;
-  MemoryHistory* memory_history() const;
-  gfx::Size device_viewport_size() const;
-  float device_scale_factor() const;
-  DebugRectHistory* debug_rect_history() const;
-  bool IsActiveTree() const;
-  bool IsPendingTree() const;
-  bool IsRecycleTree() const;
-  bool IsSyncTree() const;
-  LayerImpl* FindActiveTreeLayerById(int id);
-  LayerImpl* FindPendingTreeLayerById(int id);
-  bool PinchGestureActive() const;
-  BeginFrameArgs CurrentBeginFrameArgs() const;
-  base::TimeDelta begin_impl_frame_interval() const;
-  void SetNeedsCommit();
-  gfx::Rect DeviceViewport() const;
-  gfx::Size DrawViewportSize() const;
-  const gfx::Rect ViewportRectForTilePriority() const;
-  scoped_ptr<ScrollbarAnimationController> CreateScrollbarAnimationController(
-      LayerImpl* scrolling_layer);
-  void DidAnimateScrollOffset();
-  void InputScrollAnimationFinished();
-  bool use_gpu_rasterization() const;
-  GpuRasterizationStatus GetGpuRasterizationStatus() const;
-  bool create_low_res_tiling() const;
-  BlockingTaskRunner* BlockingMainThreadTaskRunner() const;
-  bool RequiresHighResToDraw() const;
-  bool SmoothnessTakesPriority() const;
-
-  // Tree specific methods exposed to layer-impl tree.
-  // ---------------------------------------------------------------------------
-  void SetNeedsRedraw();
-
-  // Tracing methods.
-  // ---------------------------------------------------------------------------
-  void GetAllTilesAndPrioritiesForTracing(
-      std::map<const Tile*, TilePriority>* tile_map) const;
-  void AsValueInto(base::trace_event::TracedValue* dict) const;
-
-  // Other public methods
-  // ---------------------------------------------------------------------------
-  LayerImpl* root_layer() const { return root_layer_.get(); }
-  void SetRootLayer(scoped_ptr<LayerImpl>);
-  scoped_ptr<LayerImpl> DetachLayerTree();
-
-  void PushPropertiesTo(LayerTreeImpl* tree_impl);
-
-  int source_frame_number() const { return source_frame_number_; }
-  void set_source_frame_number(int frame_number) {
-    source_frame_number_ = frame_number;
-  }
-
-  HeadsUpDisplayLayerImpl* hud_layer() { return hud_layer_; }
-  void set_hud_layer(HeadsUpDisplayLayerImpl* layer_impl) {
-    hud_layer_ = layer_impl;
-  }
-
-  LayerImpl* InnerViewportScrollLayer() const;
-  // This function may return NULL, it is the caller's responsibility to check.
-  LayerImpl* OuterViewportScrollLayer() const;
-  gfx::ScrollOffset TotalScrollOffset() const;
-  gfx::ScrollOffset TotalMaxScrollOffset() const;
-
-  LayerImpl* InnerViewportContainerLayer() const;
-  LayerImpl* OuterViewportContainerLayer() const;
-  LayerImpl* CurrentlyScrollingLayer() const;
-  void SetCurrentlyScrollingLayer(LayerImpl* layer);
-  void ClearCurrentlyScrollingLayer();
-
-  void SetViewportLayersFromIds(int overscroll_elasticity_layer,
-                                int page_scale_layer_id,
-                                int inner_viewport_scroll_layer_id,
-                                int outer_viewport_scroll_layer_id);
-  void ClearViewportLayers();
-  LayerImpl* overscroll_elasticity_layer() {
-    return overscroll_elasticity_layer_;
-  }
-  LayerImpl* page_scale_layer() { return page_scale_layer_; }
-  void ApplySentScrollAndScaleDeltasFromAbortedCommit();
-
-  SkColor background_color() const { return background_color_; }
-  void set_background_color(SkColor color) { background_color_ = color; }
-
-  bool has_transparent_background() const {
-    return has_transparent_background_;
-  }
-  void set_has_transparent_background(bool transparent) {
-    has_transparent_background_ = transparent;
-  }
-
-  void SetPageScaleOnActiveTree(float active_page_scale);
-  void PushPageScaleFromMainThread(float page_scale_factor,
-                                   float min_page_scale_factor,
-                                   float max_page_scale_factor);
-  float current_page_scale_factor() const {
-    return page_scale_factor()->Current(IsActiveTree());
-  }
-  float min_page_scale_factor() const { return min_page_scale_factor_; }
-  float max_page_scale_factor() const { return max_page_scale_factor_; }
-
-  float page_scale_delta() const { return page_scale_factor()->Delta(); }
-
-  SyncedProperty<ScaleGroup>* page_scale_factor();
-  const SyncedProperty<ScaleGroup>* page_scale_factor() const;
-
-  SyncedElasticOverscroll* elastic_overscroll() {
-    return elastic_overscroll_.get();
-  }
-  const SyncedElasticOverscroll* elastic_overscroll() const {
-    return elastic_overscroll_.get();
-  }
-
-  SyncedTopControls* top_controls_shown_ratio() {
-    return top_controls_shown_ratio_.get();
-  }
-  const SyncedTopControls* top_controls_shown_ratio() const {
-    return top_controls_shown_ratio_.get();
-  }
-
-  // Updates draw properties and render surface layer list, as well as tile
-  // priorities. Returns false if it was unable to update.  Updating lcd
-  // text may cause invalidations, so should only be done after a commit.
-  bool UpdateDrawProperties(bool update_lcd_text);
-
-  void set_needs_update_draw_properties() {
-    needs_update_draw_properties_ = true;
-  }
-  bool needs_update_draw_properties() const {
-    return needs_update_draw_properties_;
-  }
-
-  void set_needs_full_tree_sync(bool needs) { needs_full_tree_sync_ = needs; }
-  bool needs_full_tree_sync() const { return needs_full_tree_sync_; }
-
-  void ForceRedrawNextActivation() { next_activation_forces_redraw_ = true; }
-
-  void set_has_ever_been_drawn(bool has_drawn) {
-    has_ever_been_drawn_ = has_drawn;
-  }
-  bool has_ever_been_drawn() const { return has_ever_been_drawn_; }
-
-  void set_ui_resource_request_queue(const UIResourceRequestQueue& queue);
-
-  const LayerImplList& RenderSurfaceLayerList() const;
-  const Region& UnoccludedScreenSpaceRegion() const;
-
-  // These return the size of the root scrollable area and the size of
-  // the user-visible scrolling viewport, in CSS layout coordinates.
-  gfx::Size ScrollableSize() const;
-  gfx::SizeF ScrollableViewportSize() const;
-
-  gfx::Rect RootScrollLayerDeviceViewportBounds() const;
-
-  LayerImpl* LayerById(int id);
-
-  // These should be called by LayerImpl's ctor/dtor.
-  void RegisterLayer(LayerImpl* layer);
-  void UnregisterLayer(LayerImpl* layer);
-
-  size_t NumLayers();
-
-  AnimationRegistrar* GetAnimationRegistrar() const;
-
-  void PushPersistedState(LayerTreeImpl* pending_tree);
-
-  void DidBecomeActive();
-
-  bool ContentsTexturesPurged() const;
-  void SetContentsTexturesPurged();
-  void ResetContentsTexturesPurged();
-
-  // Set on the active tree when the viewport size recently changed
-  // and the active tree's size is now out of date.
-  bool ViewportSizeInvalid() const;
-  void SetViewportSizeInvalid();
-  void ResetViewportSizeInvalid();
-
-  // Useful for debug assertions, probably shouldn't be used for anything else.
-  Proxy* proxy() const;
-
-  void SetRootLayerScrollOffsetDelegate(
-      LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate);
-  void OnRootLayerDelegatedScrollOffsetChanged();
-  void UpdateScrollOffsetDelegate();
-  gfx::ScrollOffset GetDelegatedScrollOffset(LayerImpl* layer);
-
-  // Call this function when you expect there to be a swap buffer.
-  // See swap_promise.h for how to use SwapPromise.
-  void QueueSwapPromise(scoped_ptr<SwapPromise> swap_promise);
-
-  // Take the |new_swap_promise| and append it to |swap_promise_list_|.
-  void PassSwapPromises(ScopedPtrVector<SwapPromise>* new_swap_promise);
-  void FinishSwapPromises(CompositorFrameMetadata* metadata);
-  void BreakSwapPromises(SwapPromise::DidNotSwapReason reason);
-
-  void DidModifyTilePriorities();
-
-  ResourceProvider::ResourceId ResourceIdForUIResource(UIResourceId uid) const;
-  void ProcessUIResourceRequestQueue();
-
-  bool IsUIResourceOpaque(UIResourceId uid) const;
-
-  void RegisterPictureLayerImpl(PictureLayerImpl* layer);
-  void UnregisterPictureLayerImpl(PictureLayerImpl* layer);
-  const std::vector<PictureLayerImpl*>& picture_layers() const {
-    return picture_layers_;
-  }
-
-  void AddLayerWithCopyOutputRequest(LayerImpl* layer);
-  void RemoveLayerWithCopyOutputRequest(LayerImpl* layer);
-  const std::vector<LayerImpl*>& LayersWithCopyOutputRequest() const;
-
-  int current_render_surface_list_id() const {
-    return render_surface_layer_list_id_;
-  }
-
-  LayerImpl* FindFirstScrollingLayerThatIsHitByPoint(
-      const gfx::PointF& screen_space_point);
-
-  LayerImpl* FindLayerThatIsHitByPoint(const gfx::PointF& screen_space_point);
-
-  LayerImpl* FindLayerWithWheelHandlerThatIsHitByPoint(
-      const gfx::PointF& screen_space_point);
-
-  LayerImpl* FindLayerThatIsHitByPointInTouchHandlerRegion(
-      const gfx::PointF& screen_space_point);
-
-  void RegisterSelection(const LayerSelectionBound& start,
-                         const LayerSelectionBound& end);
-
-  // Compute the current selection handle location and visbility with respect to
-  // the viewport.
-  void GetViewportSelection(ViewportSelectionBound* start,
-                            ViewportSelectionBound* end);
-
-  void set_top_controls_shrink_blink_size(bool shrink);
-  bool top_controls_shrink_blink_size() const {
-    return top_controls_shrink_blink_size_;
-  }
-  bool SetCurrentTopControlsShownRatio(float ratio);
-  float CurrentTopControlsShownRatio() const {
-    return top_controls_shown_ratio_->Current(IsActiveTree());
-  }
-  void set_top_controls_height(float top_controls_height);
-  float top_controls_height() const { return top_controls_height_; }
-  void PushTopControlsFromMainThread(float top_controls_shown_ratio);
-
-  void SetPendingPageScaleAnimation(
-      scoped_ptr<PendingPageScaleAnimation> pending_animation);
-  scoped_ptr<PendingPageScaleAnimation> TakePendingPageScaleAnimation();
-
- protected:
-  explicit LayerTreeImpl(
-      LayerTreeHostImpl* layer_tree_host_impl,
-      scoped_refptr<SyncedProperty<ScaleGroup>> page_scale_factor,
-      scoped_refptr<SyncedTopControls> top_controls_shown_ratio,
-      scoped_refptr<SyncedElasticOverscroll> elastic_overscroll);
-  float ClampPageScaleFactorToLimits(float page_scale_factor) const;
-  void PushPageScaleFactorAndLimits(const float* page_scale_factor,
-                                    float min_page_scale_factor,
-                                    float max_page_scale_factor);
-  bool SetPageScaleFactorLimits(float min_page_scale_factor,
-                                float max_page_scale_factor);
-  void DidUpdatePageScale();
-  void HideInnerViewportScrollbarsIfNearMinimumScale();
-  void PushTopControls(const float* top_controls_shown_ratio);
-  LayerTreeHostImpl* layer_tree_host_impl_;
-  int source_frame_number_;
-  scoped_ptr<LayerImpl> root_layer_;
-  HeadsUpDisplayLayerImpl* hud_layer_;
-  LayerImpl* currently_scrolling_layer_;
-  LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate_;
-  scoped_ptr<LayerScrollOffsetDelegateProxy>
-      inner_viewport_scroll_delegate_proxy_;
-  scoped_ptr<LayerScrollOffsetDelegateProxy>
-      outer_viewport_scroll_delegate_proxy_;
-  SkColor background_color_;
-  bool has_transparent_background_;
-
-  LayerImpl* overscroll_elasticity_layer_;
-  LayerImpl* page_scale_layer_;
-  LayerImpl* inner_viewport_scroll_layer_;
-  LayerImpl* outer_viewport_scroll_layer_;
-
-  LayerSelectionBound selection_start_;
-  LayerSelectionBound selection_end_;
-
-  scoped_refptr<SyncedProperty<ScaleGroup>> page_scale_factor_;
-  float min_page_scale_factor_;
-  float max_page_scale_factor_;
-
-  scoped_refptr<SyncedElasticOverscroll> elastic_overscroll_;
-
-  typedef base::hash_map<int, LayerImpl*> LayerIdMap;
-  LayerIdMap layer_id_map_;
-
-  std::vector<PictureLayerImpl*> picture_layers_;
-  std::vector<LayerImpl*> layers_with_copy_output_request_;
-
-  // Persisted state for non-impl-side-painting.
-  int scrolling_layer_id_from_previous_tree_;
-
-  // List of visible layers for the most recently prepared frame.
-  LayerImplList render_surface_layer_list_;
-  // After drawing the |render_surface_layer_list_| the areas in this region
-  // would not be fully covered by opaque content.
-  Region unoccluded_screen_space_region_;
-
-  bool contents_textures_purged_;
-  bool viewport_size_invalid_;
-  bool needs_update_draw_properties_;
-
-  // In impl-side painting mode, this is true when the tree may contain
-  // structural differences relative to the active tree.
-  bool needs_full_tree_sync_;
-
-  bool next_activation_forces_redraw_;
-
-  bool has_ever_been_drawn_;
-
-  ScopedPtrVector<SwapPromise> swap_promise_list_;
-
-  UIResourceRequestQueue ui_resource_request_queue_;
-
-  int render_surface_layer_list_id_;
-
-  // Whether or not Blink's viewport size was shrunk by the height of the top
-  // controls at the time of the last layout.
-  bool top_controls_shrink_blink_size_;
-
-  float top_controls_height_;
-
-  // The amount that the top controls are shown from 0 (hidden) to 1 (fully
-  // shown).
-  scoped_refptr<SyncedTopControls> top_controls_shown_ratio_;
-
-  scoped_ptr<PendingPageScaleAnimation> pending_page_scale_animation_;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
-};
-
-}  // namespace cc
-
-#endif  // CC_TREES_LAYER_TREE_IMPL_H_