cc : Move LayerImpl::children to test properties

cc/test/test_layer_tree_host_base.cc

 // Copyright 2016 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/test_layer_tree_host_base.h"
 
 #include "cc/test/fake_output_surface.h"
 #include "cc/test/fake_raster_source.h"
 #include "cc/trees/layer_tree_impl.h"
 
@@ skipping 102 matching lines @@
         LayerImpl::Create(pending_tree, root_id_);
     pending_layer = FakePictureLayerImpl::Create(pending_tree, id_);
     if (!tile_size.IsEmpty())
       pending_layer->set_fixed_tile_size(tile_size);
     pending_layer->SetDrawsContent(true);
     pending_layer->SetScrollClipLayer(new_pending_root->id());
     pending_root = new_pending_root.get();
     pending_tree->SetRootLayer(std::move(new_pending_root));
   } else {
     pending_layer.reset(static_cast<FakePictureLayerImpl*>(
-        pending_root->RemoveChildForTesting(pending_root->children()[0])
+        pending_root
+            ->RemoveChildForTesting(
+                pending_root->test_properties()->children[0])
             .release()));
     if (!tile_size.IsEmpty())
       pending_layer->set_fixed_tile_size(tile_size);
   }
   pending_root->test_properties()->force_render_surface = true;
   // The bounds() just mirror the raster source size.
   pending_layer->SetBounds(raster_source->GetSize());
   pending_layer->SetRasterSourceOnPending(raster_source, invalidation);
 
   pending_root->AddChild(std::move(pending_layer));
@@ skipping 37 matching lines @@
   state.hard_memory_limit_in_bytes = state.soft_memory_limit_in_bytes * 2;
   state.memory_limit_policy = ALLOW_ANYTHING;
   state.tree_priority = SAME_PRIORITY_FOR_BOTH_TREES;
 
   host_impl_->resource_pool()->SetResourceUsageLimits(
       state.soft_memory_limit_in_bytes, state.num_resources_limit);
   host_impl_->tile_manager()->SetGlobalStateForTesting(state);
 }
 
 }  // namespace cc