cc: Pass LayerTreeHostImpl to LayerImpl constructor

cc/test/fake_layer_tree_host_impl.cc

Index: cc/test/fake_layer_tree_host_impl.cc
diff --git a/cc/test/fake_layer_tree_host_impl.cc b/cc/test/fake_layer_tree_host_impl.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f2df058cde34c5055fffcf25efdf5fe2f148f269
--- /dev/null
+++ b/cc/test/fake_layer_tree_host_impl.cc
@@ -0,0 +1,20 @@
+// 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.
+
+#include "cc/test/fake_layer_tree_host_impl.h"
+
+namespace cc {
+
+FakeLayerTreeHostImpl::FakeLayerTreeHostImpl(Proxy* proxy)
+    : LayerTreeHostImpl(settings_, &client_, proxy)
+{
+    // Explicitly clear all debug settings.
+    setDebugState(LayerTreeDebugState());
+}
+
+FakeLayerTreeHostImpl::~FakeLayerTreeHostImpl()
+{
+}
+
+}  // namespace cc