cc: Consolidate LayerList types.

cc/layers/layer_lists.h

Index: cc/layers/layer_lists.h
diff --git a/cc/layers/layer_lists.h b/cc/layers/layer_lists.h
new file mode 100644
index 0000000000000000000000000000000000000000..83ef5fd049172b37a774fe8bb3dcaf2b4ae23f01
--- /dev/null
+++ b/cc/layers/layer_lists.h
@@ -0,0 +1,24 @@
+// 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.
+
+#ifndef CC_LAYERS_LAYER_LISTS_H_
+#define CC_LAYERS_LAYER_LISTS_H_
+
+#include <vector>
+
+#include "base/memory/ref_counted.h"
+#include "cc/base/scoped_ptr_vector.h"
+
+namespace cc {
+class Layer;
+class LayerImpl;
+
+typedef std::vector<scoped_refptr<Layer> > LayerList;
+
+typedef ScopedPtrVector<LayerImpl> OwnedLayerImplList;
+typedef std::vector<LayerImpl*> LayerImplList;
+
+}  // namespace cc
+
+#endif  // CC_LAYERS_LAYER_LISTS_H_