Revert "cc: Remove layers that are not drawn from tile manager."

This reverts commit f0d165f7.

"cc: Remove layers that are not drawn from tile manager.

    This patch removes layers that are no longer have their tile priorities
    updated from tile manager, in order to ensure that we don't process
    tile or use any other information from these layers.

    BUG=176557
    R=enne

    Review URL: https://codereview.chromium.org/279543003

    git-svn-id: svn://svn.chromium.org/chrome/trunk/src@270247 0039d316-1c4b-4281-b951-d872f2087c98
"

BUG=358350
NOTRY=True

Review URL: https://codereview.chromium.org/286873002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@270452 0039d316-1c4b-4281-b951-d872f2087c98

cc/layers/picture_layer_impl.cc

@@ -359,16 +359,10 @@ void PictureLayerImpl::AppendQuads(QuadSink* quad_sink,
 }
 
 void PictureLayerImpl::DidUnregisterLayer() {
-  TRACE_EVENT0("cc", "PictureLayerImpl::DidUnregisterLayer");
-
   layer_needs_to_register_itself_ = true;
-  RemoveAllTilings();
 }
 
 void PictureLayerImpl::UpdateTilePriorities() {
-  TRACE_EVENT0("cc", "PictureLayerImpl::UpdateTilePriorities");
-
-  DCHECK(IsDrawnRenderSurfaceLayerListMember());
   DCHECK(!needs_post_commit_initialization_);
   CHECK(should_update_tile_priorities_);
 

cc/resources/tile_manager.cc

@@ -678,19 +678,6 @@ void TileManager::GetTilesWithAssignedBins(PrioritizedTileSet* tiles) {
   }
 }
 
-void TileManager::CleanUpLayers() {
-  for (size_t i = 0; i < layers_.size(); ++i) {
-    if (layers_[i]->IsDrawnRenderSurfaceLayerListMember())
-      continue;
-
-    layers_[i]->DidUnregisterLayer();
-    std::swap(layers_[i], layers_.back());
-    layers_.pop_back();
-    --i;
-    prioritized_tiles_dirty_ = true;
-  }
-}
-
 void TileManager::ManageTiles(const GlobalStateThatImpactsTilePriority& state) {
   TRACE_EVENT0("cc", "TileManager::ManageTiles");
 
@@ -700,8 +687,6 @@ void TileManager::ManageTiles(const GlobalStateThatImpactsTilePriority& state) {
     prioritized_tiles_dirty_ = true;
   }
 
-  CleanUpLayers();
-
   // We need to call CheckForCompletedTasks() once in-between each call
   // to ScheduleTasks() to prevent canceled tasks from being scheduled.
   if (!did_check_for_completed_tasks_since_last_schedule_tasks_) {

cc/resources/tile_manager.h

@@ -286,7 +286,6 @@ class CC_EXPORT TileManager : public RasterizerClient,
   scoped_refptr<RasterTask> CreateRasterTask(Tile* tile);
   scoped_ptr<base::Value> GetMemoryRequirementsAsValue() const;
   void UpdatePrioritizedTileSetIfNeeded();
-  void CleanUpLayers();
 
   TileManagerClient* client_;
   ResourcePool* resource_pool_;