Transfer LayerImpl ownership to LayerTreeImpl

cc/trees/layer_tree_impl_unittest.cc

 // Copyright 2014 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_impl.h"
 
 #include "cc/layers/heads_up_display_layer_impl.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/solid_color_scrollbar_layer_impl.h"
 #include "cc/test/fake_impl_task_runner_provider.h"
@@ skipping 865 matching lines @@
                                  false, false);
     grand_child1->SetDrawsContent(true);
 
     child1->AddChild(std::move(grand_child1));
     root->AddChild(std::move(child1));
     root->AddChild(std::move(child2));
 
     ExecuteCalculateDrawProperties(root.get());
   }
 
-  LayerImpl* child1 = root->children()[0].get();
-  LayerImpl* child2 = root->children()[1].get();
-  LayerImpl* grand_child1 = child1->children()[0].get();
+  LayerImpl* child1 = root->children()[0];
+  LayerImpl* child2 = root->children()[1];
+  LayerImpl* grand_child1 = child1->children()[0];
 
   host_impl().SetViewportSize(root->bounds());
   host_impl().active_tree()->SetRootLayer(std::move(root));
   host_impl().UpdateNumChildrenAndDrawPropertiesForActiveTree();
 
   // Sanity check the scenario we just created.
   ASSERT_TRUE(child1);
   ASSERT_TRUE(child2);
   ASSERT_TRUE(grand_child1);
   ASSERT_EQ(1u, RenderSurfaceLayerList().size());
@@ skipping 205 matching lines @@
                                  transform_origin, position, bounds, true,
                                  false, false);
     grand_child1->SetDrawsContent(true);
     grand_child1->SetShouldFlattenTransform(false);
 
     child1->AddChild(std::move(grand_child1));
     root->AddChild(std::move(child1));
     root->AddChild(std::move(child2));
   }
 
-  LayerImpl* child1 = root->children()[0].get();
-  LayerImpl* child2 = root->children()[1].get();
-  LayerImpl* grand_child1 = child1->children()[0].get();
+  LayerImpl* child1 = root->children()[0];
+  LayerImpl* child2 = root->children()[1];
+  LayerImpl* grand_child1 = child1->children()[0];
 
   host_impl().SetViewportSize(root->bounds());
   host_impl().active_tree()->SetRootLayer(std::move(root));
   host_impl().UpdateNumChildrenAndDrawPropertiesForActiveTree();
 
   // Sanity check the scenario we just created.
   ASSERT_TRUE(child1);
   ASSERT_TRUE(child2);
   ASSERT_TRUE(grand_child1);
   ASSERT_EQ(1u, RenderSurfaceLayerList().size());
@@ skipping 214 matching lines @@
     grand_child1->SetDrawsContent(true);
     grand_child1->SetForceRenderSurface(true);
 
     child1->AddChild(std::move(grand_child1));
     root->AddChild(std::move(child1));
     root->AddChild(std::move(child2));
 
     ExecuteCalculateDrawProperties(root.get());
   }
 
-  LayerImpl* child1 = root->children()[0].get();
-  LayerImpl* child2 = root->children()[1].get();
-  LayerImpl* grand_child1 = child1->children()[0].get();
+  LayerImpl* child1 = root->children()[0];
+  LayerImpl* child2 = root->children()[1];
+  LayerImpl* grand_child1 = child1->children()[0];
 
   host_impl().SetViewportSize(root->bounds());
   host_impl().active_tree()->SetRootLayer(std::move(root));
   host_impl().UpdateNumChildrenAndDrawPropertiesForActiveTree();
 
   // Sanity check the scenario we just created.
   ASSERT_TRUE(child1);
   ASSERT_TRUE(child2);
   ASSERT_TRUE(grand_child1);
   ASSERT_TRUE(child1->render_surface());
@@ skipping 321 matching lines @@
   host_impl().active_tree()->BuildPropertyTreesForTesting();
   host_impl().active_tree()->PushPageScaleFromMainThread(
       page_scale_factor, page_scale_factor, max_page_scale_factor);
   host_impl().active_tree()->SetPageScaleOnActiveTree(page_scale_factor);
   host_impl().UpdateNumChildrenAndDrawPropertiesForActiveTree();
 
   // Sanity check the scenario we just created.
   // The visible content rect for test_layer is actually 100x100, even though
   // its layout size is 50x50, positioned at 25x25.
   LayerImpl* test_layer =
-      host_impl().active_tree()->root_layer()->children()[0].get();
+      host_impl().active_tree()->root_layer()->children()[0];
   ASSERT_EQ(1u, RenderSurfaceLayerList().size());
   ASSERT_EQ(1u, root_layer()->render_surface()->layer_list().size());
 
   // Check whether the child layer fits into the root after scaled.
   EXPECT_EQ(gfx::Rect(test_layer->bounds()), test_layer->visible_layer_rect());
 
   // Hit checking for a point outside the layer should return a null pointer
   // (the root layer does not have a touch event handler, so it will not be
   // tested either).
   gfx::PointF test_point(76.f, 76.f);
@@ skipping 271 matching lines @@
 
     test_layer->SetDrawsContent(false);
     test_layer->SetTouchEventHandlerRegion(touch_handler_region);
     root->AddChild(std::move(test_layer));
   }
   host_impl().SetViewportSize(root->bounds());
   host_impl().active_tree()->SetRootLayer(std::move(root));
   host_impl().UpdateNumChildrenAndDrawPropertiesForActiveTree();
 
   LayerImpl* test_layer =
-      host_impl().active_tree()->root_layer()->children()[0].get();
+      host_impl().active_tree()->root_layer()->children()[0];
   // As test_layer doesn't draw content, the layer list of root's render surface
   // should contain only the root layer.
   ASSERT_EQ(1u, RenderSurfaceLayerList().size());
   ASSERT_EQ(1u, root_layer()->render_surface()->layer_list().size());
 
   // Hit testing for a point outside the test layer should return null pointer.
   // We also implicitly check that the updated screen space transform of a layer
   // that is not in drawn render surface layer list (test_layer) is used during
   // hit testing (becuase the point is inside test_layer with respect to the old
   // screen space transform).
@@ skipping 10 matching lines @@
   EXPECT_FALSE(result_layer);
   EXPECT_FALSE(test_layer->IsDrawnRenderSurfaceLayerListMember());
   EXPECT_TRANSFORMATION_MATRIX_EQ(
       expected_screen_space_transform,
       draw_property_utils::ScreenSpaceTransform(
           test_layer,
           host_impl().active_tree()->property_trees()->transform_tree));
 
   // We change the position of the test layer such that the test point is now
   // inside the test_layer.
-  test_layer = host_impl().active_tree()->root_layer()->children()[0].get();
+  test_layer = host_impl().active_tree()->root_layer()->children()[0];
   test_layer->SetPosition(gfx::PointF(10.f, 10.f));
   test_layer->NoteLayerPropertyChanged();
   expected_screen_space_transform.MakeIdentity();
   expected_screen_space_transform.Translate(10.f, 10.f);
 
   host_impl().active_tree()->property_trees()->needs_rebuild = true;
   host_impl().active_tree()->BuildPropertyTreesForTesting();
   result_layer =
       host_impl().active_tree()->FindLayerThatIsHitByPointInTouchHandlerRegion(
           test_point);
@@ skipping 348 matching lines @@
 TEST_F(LayerTreeImplTest, DeviceScaleFactorNeedsDrawPropertiesUpdate) {
   host_impl().active_tree()->SetDeviceScaleFactor(1.f);
   host_impl().active_tree()->UpdateDrawProperties(false);
   EXPECT_FALSE(host_impl().active_tree()->needs_update_draw_properties());
   host_impl().active_tree()->SetDeviceScaleFactor(2.f);
   EXPECT_TRUE(host_impl().active_tree()->needs_update_draw_properties());
 }
 
 }  // namespace
 }  // namespace cc