Add layer name into frame viewer

cc/layers/layer_client.h

Index: cc/layers/layer_client.h
diff --git a/cc/layers/layer_client.h b/cc/layers/layer_client.h
new file mode 100644
index 0000000000000000000000000000000000000000..73c0fd2514b3081a524c5704552f17790d71a8f0
--- /dev/null
+++ b/cc/layers/layer_client.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_CLIENT_H_
+#define CC_LAYERS_LAYER_CLIENT_H_
+
+#include <string>
+
+#include "cc/base/cc_export.h"
+
+namespace cc {
+
+class CC_EXPORT LayerClient {
+ public:
+  virtual std::string DebugName() = 0;
+
+ protected:
+  virtual ~LayerClient() {}
+};
+
+}  // namespace cc
+
+#endif  // CC_LAYERS_LAYER_CLIENT_H_