cc: Refactor how picture layers are exposed to the tile manager.

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 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/trees/layer_tree_host_impl.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/basictypes.h"
@@ skipping 1218 matching lines @@
   // Mark priorities as dirty and schedule a ManageTiles().
   tile_priorities_dirty_ = true;
   client_->SetNeedsManageTilesOnImplThread();
 }
 
 void LayerTreeHostImpl::DidInitializeVisibleTile() {
   if (client_ && !client_->IsInsideDraw())
     client_->DidInitializeVisibleTileOnImplThread();
 }
 
+const std::vector<PictureLayerImpl*>& LayerTreeHostImpl::GetPictureLayers() {
+  return picture_layers_;
+}
+
 void LayerTreeHostImpl::NotifyReadyToActivate() {
   client_->NotifyReadyToActivate();
 }
 
 void LayerTreeHostImpl::NotifyTileStateChanged(const Tile* tile) {
   TRACE_EVENT0("cc", "LayerTreeHostImpl::NotifyTileStateChanged");
 
   if (active_tree_) {
     LayerImpl* layer_impl =
         active_tree_->FindActiveTreeLayerById(tile->layer_id());
@@ skipping 1879 matching lines @@
 void LayerTreeHostImpl::RemoveSwapPromiseMonitor(SwapPromiseMonitor* monitor) {
   swap_promise_monitor_.erase(monitor);
 }
 
 void LayerTreeHostImpl::NotifySwapPromiseMonitorsOfSetNeedsRedraw() {
   std::set<SwapPromiseMonitor*>::iterator it = swap_promise_monitor_.begin();
   for (; it != swap_promise_monitor_.end(); it++)
     (*it)->OnSetNeedsRedrawOnImpl();
 }
 
+void LayerTreeHostImpl::RegisterPictureLayerImpl(PictureLayerImpl* layer) {
+  DCHECK(std::find(picture_layers_.begin(), picture_layers_.end(), layer) ==
+         picture_layers_.end());
+  picture_layers_.push_back(layer);
+}
+
+void LayerTreeHostImpl::UnregisterPictureLayerImpl(PictureLayerImpl* layer) {
+  std::vector<PictureLayerImpl*>::iterator it =
+      std::find(picture_layers_.begin(), picture_layers_.end(), layer);
+  DCHECK(it != picture_layers_.end());
+  picture_layers_.erase(it);
+}
+
 }  // namespace cc