Ensure that mask layer is of the same size as the owning layer.

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 306 matching lines @@
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetBlendMode(arbitrary_blend_mode));
   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()));
 
   // Should be a different size than previous call, to ensure it marks tree
   // changed.
   gfx::Size arbitrary_size = gfx::Size(111, 222);
-  EXPECT_CALL(*layer_tree_host_, SetNeedsCommit()).Times(1);
+  EXPECT_CALL(*layer_tree_host_, SetNeedsCommit()).Times(2);
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetBounds(arbitrary_size));
+  EXECUTE_AND_VERIFY_SUBTREE_CHANGED(dummy_layer1->SetBounds(arbitrary_size));
   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()));
 
   FilterOperations arbitrary_filters;
   arbitrary_filters.Append(FilterOperation::CreateOpacityFilter(0.5f));
   EXPECT_CALL(*layer_tree_host_, SetNeedsCommit()).Times(1);
   EXECUTE_AND_VERIFY_SUBTREE_CHANGED(root->SetFilters(arbitrary_filters));
@@ skipping 1144 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