cc: Pass Occlusion instead of OcclusionTracker to LayerImpls

cc/layers/painted_scrollbar_layer_impl.cc

 // 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.
 
 #include "cc/layers/painted_scrollbar_layer_impl.h"
 
 #include <algorithm>
 
 #include "cc/animation/scrollbar_animation_controller.h"
 #include "cc/layers/layer.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/texture_draw_quad.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "cc/trees/layer_tree_settings.h"
-#include "cc/trees/occlusion_tracker.h"
+#include "cc/trees/occlusion.h"
 #include "ui/gfx/rect_conversions.h"
 
 namespace cc {
 
 scoped_ptr<PaintedScrollbarLayerImpl> PaintedScrollbarLayerImpl::Create(
     LayerTreeImpl* tree_impl,
     int id,
     ScrollbarOrientation orientation) {
   return make_scoped_ptr(
       new PaintedScrollbarLayerImpl(tree_impl, id, orientation));
@@ skipping 36 matching lines @@
 }
 
 bool PaintedScrollbarLayerImpl::WillDraw(DrawMode draw_mode,
                                   ResourceProvider* resource_provider) {
   DCHECK(draw_mode != DRAW_MODE_RESOURCELESS_SOFTWARE);
   return LayerImpl::WillDraw(draw_mode, resource_provider);
 }
 
 void PaintedScrollbarLayerImpl::AppendQuads(
     RenderPass* render_pass,
-    const OcclusionTracker<LayerImpl>& occlusion_tracker,
+    const Occlusion& occlusion_in_content_space,
     AppendQuadsData* append_quads_data) {
   bool premultipled_alpha = true;
   bool flipped = false;
   gfx::PointF uv_top_left(0.f, 0.f);
   gfx::PointF uv_bottom_right(1.f, 1.f);
   gfx::Rect bounds_rect(bounds());
   gfx::Rect content_bounds_rect(content_bounds());
 
   SharedQuadState* shared_quad_state =
       render_pass->CreateAndAppendSharedQuadState();
   PopulateSharedQuadState(shared_quad_state);
 
   AppendDebugBorderQuad(
       render_pass, content_bounds(), shared_quad_state, append_quads_data);
 
   gfx::Rect thumb_quad_rect = ComputeThumbQuadRect();
-  Occlusion occlusion =
-      occlusion_tracker.GetCurrentOcclusionForLayer(draw_transform());
   gfx::Rect visible_thumb_quad_rect =
-      occlusion.GetUnoccludedContentRect(thumb_quad_rect);
+      occlusion_in_content_space.GetUnoccludedContentRect(thumb_quad_rect);
 
   ResourceProvider::ResourceId thumb_resource_id =
       layer_tree_impl()->ResourceIdForUIResource(thumb_ui_resource_id_);
   ResourceProvider::ResourceId track_resource_id =
       layer_tree_impl()->ResourceIdForUIResource(track_ui_resource_id_);
 
   if (thumb_resource_id && !visible_thumb_quad_rect.IsEmpty()) {
     gfx::Rect opaque_rect;
     const float opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
     TextureDrawQuad* quad =
         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
     quad->SetNew(shared_quad_state,
                  thumb_quad_rect,
                  opaque_rect,
                  visible_thumb_quad_rect,
                  thumb_resource_id,
                  premultipled_alpha,
                  uv_top_left,
                  uv_bottom_right,
                  SK_ColorTRANSPARENT,
                  opacity,
                  flipped);
   }
 
   gfx::Rect track_quad_rect = content_bounds_rect;
   gfx::Rect visible_track_quad_rect =
-      occlusion.GetUnoccludedContentRect(track_quad_rect);
+      occlusion_in_content_space.GetUnoccludedContentRect(track_quad_rect);
   if (track_resource_id && !visible_track_quad_rect.IsEmpty()) {
     gfx::Rect opaque_rect(contents_opaque() ? track_quad_rect : gfx::Rect());
     const float opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
     TextureDrawQuad* quad =
         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
     quad->SetNew(shared_quad_state,
                  track_quad_rect,
                  opaque_rect,
                  visible_track_quad_rect,
                  track_resource_id,
@@ skipping 52 matching lines @@
 
 bool PaintedScrollbarLayerImpl::IsThumbResizable() const {
   return false;
 }
 
 const char* PaintedScrollbarLayerImpl::LayerTypeAsString() const {
   return "cc::PaintedScrollbarLayerImpl";
 }
 
 }  // namespace cc