Clean up tile deletion

cc/layers/picture_layer_impl.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/layers/picture_layer_impl.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 673 matching lines @@
 
 Region PictureLayerImpl::GetInvalidationRegionForDebugging() {
   // |invalidation_| gives the invalidation contained in the source frame, but
   // is not cleared after drawing from the layer. However, update_rect() is
   // cleared once the invalidation is drawn, which is useful for debugging
   // visualizations. This method intersects the two to give a more exact
   // representation of what was invalidated that is cleared after drawing.
   return IntersectRegions(invalidation_, update_rect());
 }
 
-ScopedTilePtr PictureLayerImpl::CreateTile(const Tile::CreateInfo& info) {
+std::unique_ptr<Tile> PictureLayerImpl::CreateTile(
+    const Tile::CreateInfo& info) {
   int flags = 0;
 
   // We don't handle solid color masks, so we shouldn't bother analyzing those.
   // Otherwise, always analyze to maximize memory savings.
   if (!is_mask_)
     flags = Tile::USE_PICTURE_ANALYSIS;
 
   if (contents_opaque())
     flags |= Tile::IS_OPAQUE;
 
@@ skipping 661 matching lines @@
 bool PictureLayerImpl::IsOnActiveOrPendingTree() const {
   return !layer_tree_impl()->IsRecycleTree();
 }
 
 bool PictureLayerImpl::HasValidTilePriorities() const {
   return IsOnActiveOrPendingTree() &&
          is_drawn_render_surface_layer_list_member();
 }
 
 }  // namespace cc