cc: Remove client/engine LayerTreeHostInProcess.

cc/test/serialization_test_utils.h

+// 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.
+
+#ifndef CC_TEST_SERIALIZATION_TEST_UTILS_H_
+#define CC_TEST_SERIALIZATION_TEST_UTILS_H_
+
+#include "base/macros.h"
+
+namespace cc {
+class CompositorStateDeserializer;
+class Layer;
+class LayerTree;
+
+void VerifySerializedTreesAreIdentical(
+    LayerTree* engine_layer_tree,
+    LayerTree* client_layer_tree,
+    CompositorStateDeserializer* compositor_state_deserializer);
+
+void VerifySerializedLayersAreIdentical(
+    Layer* engine_layer,
+    Layer* client_layer,
+    CompositorStateDeserializer* compositor_state_deserializer);
+
+}  // namespace cc
+
+#endif  // CC_TEST_SERIALIZATION_TEST_UTILS_H_