cc: Pass Occlusion instead of OcclusionTracker to LayerImpls

cc/layers/ui_resource_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/ui_resource_layer_impl.h"
 
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
 #include "cc/base/math_util.h"
 #include "cc/quads/texture_draw_quad.h"
 #include "cc/trees/layer_tree_impl.h"
-#include "cc/trees/occlusion_tracker.h"
+#include "cc/trees/occlusion.h"
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gfx/rect_f.h"
 
 namespace cc {
 
 UIResourceLayerImpl::UIResourceLayerImpl(LayerTreeImpl* tree_impl, int id)
     : LayerImpl(tree_impl, id),
       ui_resource_id_(0),
       uv_top_left_(0.f, 0.f),
       uv_bottom_right_(1.f, 1.f) {
@@ skipping 64 matching lines @@
 
 bool UIResourceLayerImpl::WillDraw(DrawMode draw_mode,
                                   ResourceProvider* resource_provider) {
   if (!ui_resource_id_ || draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE)
     return false;
   return LayerImpl::WillDraw(draw_mode, resource_provider);
 }
 
 void UIResourceLayerImpl::AppendQuads(
     RenderPass* render_pass,
-    const OcclusionTracker<LayerImpl>& occlusion_tracker,
+    const Occlusion& occlusion_in_content_space,
     AppendQuadsData* append_quads_data) {
   SharedQuadState* shared_quad_state =
       render_pass->CreateAndAppendSharedQuadState();
   PopulateSharedQuadState(shared_quad_state);
 
   AppendDebugBorderQuad(
       render_pass, content_bounds(), shared_quad_state, append_quads_data);
 
   if (!ui_resource_id_)
     return;
 
   ResourceProvider::ResourceId resource =
       layer_tree_impl()->ResourceIdForUIResource(ui_resource_id_);
 
   if (!resource)
     return;
 
   static const bool flipped = false;
   static const bool premultiplied_alpha = true;
 
   DCHECK(!bounds().IsEmpty());
 
   bool opaque = layer_tree_impl()->IsUIResourceOpaque(ui_resource_id_) ||
                 contents_opaque();
 
   gfx::Rect quad_rect(gfx::ToCeiledSize(bounds()));
   gfx::Rect opaque_rect(opaque ? quad_rect : gfx::Rect());
   gfx::Rect visible_quad_rect =
-      occlusion_tracker.GetCurrentOcclusionForLayer(
-                            draw_properties().target_space_transform)
-          .GetUnoccludedContentRect(quad_rect);
+      occlusion_in_content_space.GetUnoccludedContentRect(quad_rect);
   if (visible_quad_rect.IsEmpty())
     return;
 
   TextureDrawQuad* quad =
       render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
   quad->SetNew(shared_quad_state,
                quad_rect,
                opaque_rect,
                visible_quad_rect,
                resource,
@@ skipping 21 matching lines @@
   list->AppendDouble(vertex_opacity_[3]);
   result->Set("VertexOpacity", list);
 
   result->Set("UVTopLeft", MathUtil::AsValue(uv_top_left_).release());
   result->Set("UVBottomRight", MathUtil::AsValue(uv_bottom_right_).release());
 
   return result;
 }
 
 }  // namespace cc