cc: Pass LayerTreeHostImpl to LayerImpl constructor

cc/test/fake_layer_tree_host_impl.h

+// Copyright 2012 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_FAKE_LAYER_TREE_HOST_IMPL_H_
+#define CC_TEST_FAKE_LAYER_TREE_HOST_IMPL_H_
+
+#include "cc/layer_tree_host_impl.h"
+#include "cc/single_thread_proxy.h"
+#include "cc/test/fake_layer_tree_host_impl_client.h"
+
+namespace cc {
+
+class FakeLayerTreeHostImpl : public LayerTreeHostImpl {
+ public:
+  FakeLayerTreeHostImpl(Proxy* proxy);
+  virtual ~FakeLayerTreeHostImpl();
+
+ private:
+  FakeLayerTreeHostImplClient client_;
+  LayerTreeSettings settings_;
+};
+
+}  // namespace cc
+
+#endif  // CC_TEST_FAKE_LAYER_TREE_HOST_IMPL_H_