cc: Compute target space transform dynamically

cc/test/fake_layer_tree_host.cc

 // Copyright 2013 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/test/fake_layer_tree_host.h"
 
 #include "base/memory/ptr_util.h"
 #include "cc/animation/animation_host.h"
 #include "cc/layers/layer.h"
 #include "cc/test/fake_image_serialization_processor.h"
@@ skipping 15 matching lines @@
       mode == CompositorMode::THREADED ? base::ThreadTaskRunnerHandle::Get()
                                        : nullptr;
   SetTaskRunnerProviderForTesting(TaskRunnerProvider::Create(
       base::ThreadTaskRunnerHandle::Get(), impl_task_runner));
   client_->SetLayerTreeHost(this);
 }
 
 std::unique_ptr<FakeLayerTreeHost> FakeLayerTreeHost::Create(
     FakeLayerTreeHostClient* client,
     TestTaskGraphRunner* task_graph_runner) {
-  return Create(client, task_graph_runner, LayerTreeSettings());
+  LayerTreeSettings settings;
+  settings.verify_transform_tree_calculations = true;
+  return Create(client, task_graph_runner, settings);
 }
 
 std::unique_ptr<FakeLayerTreeHost> FakeLayerTreeHost::Create(
     FakeLayerTreeHostClient* client,
     TestTaskGraphRunner* task_graph_runner,
     const LayerTreeSettings& settings) {
   return Create(client, task_graph_runner, settings,
                 CompositorMode::SINGLE_THREADED);
 }
 
@@ skipping 64 matching lines @@
   pending_tree()->SetPropertyTrees(property_trees());
   TreeSynchronizer::PushLayerProperties(root_layer()->layer_tree_host(),
                                         pending_tree());
   animation_host()->PushPropertiesTo(host_impl_.animation_host());
 
   pending_tree()->UpdatePropertyTreeScrollOffset(property_trees());
   return pending_tree()->root_layer_for_testing();
 }
 
 }  // namespace cc