Move occlusion info to TilePriority.

cc/resources/tile.cc

 // 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.
 
 #include "cc/resources/tile.h"
 
 #include <algorithm>
 
 #include "cc/base/math_util.h"
 #include "cc/debug/traced_value.h"
@@ skipping 12 matching lines @@
            float contents_scale,
            int layer_id,
            int source_frame_number,
            int flags)
     : RefCountedManaged<Tile>(tile_manager),
       tile_manager_(tile_manager),
       tile_size_(tile_size),
       content_rect_(content_rect),
       contents_scale_(contents_scale),
       opaque_rect_(opaque_rect),
-      is_occluded_(false),
       layer_id_(layer_id),
       source_frame_number_(source_frame_number),
       flags_(flags),
       id_(s_next_id_++) {
   set_picture_pile(picture_pile);
 }
 
 Tile::~Tile() {
   TRACE_EVENT_OBJECT_DELETED_WITH_ID(
       TRACE_DISABLED_BY_DEFAULT("cc.debug"),
       "cc::Tile", this);
 }
 
 void Tile::SetPriority(WhichTree tree, const TilePriority& priority) {
   if (priority == priority_[tree])
     return;
 
   priority_[tree] = priority;
   tile_manager_->DidChangeTilePriority(this);
 }
 
 void Tile::MarkRequiredForActivation() {
   if (priority_[PENDING_TREE].required_for_activation)
     return;
 
   priority_[PENDING_TREE].required_for_activation = true;
   tile_manager_->DidChangeTilePriority(this);
 }
 
+void Tile::SetIsOccluded(WhichTree tree, bool occluded) {
+  if (priority_[tree].is_occluded == occluded)
+    return;
+
+  priority_[tree].is_occluded = occluded;
+  tile_manager_->DidChangeTilePriority(this);
+}
+
 scoped_ptr<base::Value> Tile::AsValue() const {
   scoped_ptr<base::DictionaryValue> res(new base::DictionaryValue());
   TracedValue::MakeDictIntoImplicitSnapshotWithCategory(
       TRACE_DISABLED_BY_DEFAULT("cc.debug"), res.get(), "cc::Tile", this);
   res->Set("picture_pile",
            TracedValue::CreateIDRef(picture_pile_.get()).release());
   res->SetDouble("contents_scale", contents_scale_);
   res->Set("content_rect", MathUtil::AsValue(content_rect_).release());
   res->SetInteger("layer_id", layer_id_);
   res->Set("active_priority", priority_[ACTIVE_TREE].AsValue().release());
@@ skipping 21 matching lines @@
 RasterMode Tile::DetermineRasterModeForResolution(
     TileResolution resolution) const {
   RasterMode current_mode = managed_state_.raster_mode;
   RasterMode raster_mode = resolution == LOW_RESOLUTION
                                ? LOW_QUALITY_RASTER_MODE
                                : HIGH_QUALITY_RASTER_MODE;
   return std::min(raster_mode, current_mode);
 }
 
 }  // namespace cc