cc : Stop pushing layers from hidden subtrees at commit

cc/layers/layer_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/layers/layer.h"
 
 #include <stddef.h>
 
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 289 matching lines @@
   EXPECT_CALL(*layer_tree_host_, SetNeedsCommit()).Times(1);
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetDoubleSided(false));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGES_RESET(
       root->PushPropertiesTo(root_impl.get());
       child->PushPropertiesTo(child_impl.get());
       child2->PushPropertiesTo(child2_impl.get());
       grand_child->PushPropertiesTo(grand_child_impl.get()));
 
   EXPECT_CALL(*layer_tree_host_, SetNeedsCommit()).Times(1);
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetHideLayerAndSubtree(true));
+
+  EXPECT_CALL(*layer_tree_host_, SetNeedsCommit()).Times(1);
+  EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetHideLayerAndSubtree(false));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGES_RESET(
       root->PushPropertiesTo(root_impl.get());
       child->PushPropertiesTo(child_impl.get());
       child2->PushPropertiesTo(child2_impl.get());
       grand_child->PushPropertiesTo(grand_child_impl.get()));
 
   EXPECT_CALL(*layer_tree_host_, SetNeedsCommit()).Times(1);
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetBlendMode(arbitrary_blend_mode));
   EXECUTE_AND_VERIFY_SUBTREE_CHANGES_RESET(
       root->PushPropertiesTo(root_impl.get());
@@ skipping 1166 matching lines @@
   test_layer->SetLayerTreeHost(layer_tree_host_.get());
   // Layer shouldn't have been registered by element id.
   EXPECT_EQ(nullptr, layer_tree_host_->LayerByElementId(element_id));
 
   test_layer->SetLayerTreeHost(nullptr);
   EXPECT_EQ(nullptr, layer_tree_host_->LayerByElementId(element_id));
 }
 
 }  // namespace
 }  // namespace cc