Transfer LayerImpl ownership to LayerTreeImpl

cc/trees/layer_tree_host_common_unittest.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_common.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <set>
@@ skipping 3559 matching lines @@
   root->AddChild(std::move(child));
   root->AddChild(std::move(occluding_child));
   host_impl.active_tree()->SetRootLayer(std::move(root));
   host_impl.SetVisible(true);
   host_impl.InitializeRenderer(output_surface.get());
   host_impl.active_tree()->BuildPropertyTreesForTesting();
   bool update_lcd_text = false;
   host_impl.active_tree()->UpdateDrawProperties(update_lcd_text);
 
   LayerImpl* grand_child_ptr =
-      host_impl.active_tree()->root_layer()->children()[0]->children()[0].get();
+      host_impl.active_tree()->root_layer()->children()[0]->children()[0];
 
   // Though all layers have invertible transforms, matrix multiplication using
   // floating-point math makes the draw transform uninvertible.
   EXPECT_FALSE(grand_child_ptr->DrawTransform().IsInvertible());
 
   // Since |grand_child| has an uninvertible draw transform, it is treated as
   // unoccluded (even though |occluding_child| comes later in draw order, and
   // hence potentially occludes it).
   gfx::Rect layer_bounds = gfx::Rect(grand_child_ptr->bounds());
   EXPECT_EQ(
@@ skipping 6351 matching lines @@
   EXPECT_EQ(scroll_child6.id, grand_child10->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent3->scroll_tree_index());
   EXPECT_EQ(scroll_child7.id, child8->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent4->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, child9->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, grand_child12->scroll_tree_index());
 }
 
 }  // namespace
 }  // namespace cc