Convert //cc from scoped_ptr to std::unique_ptr.

cc/layers/empty_content_layer_client.h

 // Copyright 2015 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_EMPTY_CONTENT_LAYER_CLIENT_H_
 #define CC_LAYERS_EMPTY_CONTENT_LAYER_CLIENT_H_
 
+#include <memory>
+
 #include "base/lazy_instance.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "cc/layers/content_layer_client.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace cc {
 
 class DisplayItemList;
 
 // This is used by deserialized PictureLayers which have no local
 // ContentLayerClient but still have valid content from the original serialized
@@ skipping 17 matching lines @@
 
   EmptyContentLayerClient();
   ~EmptyContentLayerClient() override;
 
   DISALLOW_COPY_AND_ASSIGN(EmptyContentLayerClient);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_EMPTY_CONTENT_LAYER_CLIENT_H_