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diff --git a/tools/aapt2/optimize/ResourceDeduper.h b/tools/aapt2/optimize/ResourceDeduper.h
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+++ b/tools/aapt2/optimize/ResourceDeduper.h
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+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef AAPT_OPTIMIZE_RESOURCEDEDUPER_H
+#define AAPT_OPTIMIZE_RESOURCEDEDUPER_H
+
+#include "android-base/macros.h"
+
+#include "process/IResourceTableConsumer.h"
+
+namespace aapt {
+
+class ResourceTable;
+
+// Removes duplicated key-value entries from dominated resources.
+class ResourceDeduper : public IResourceTableConsumer {
+ public:
+  ResourceDeduper() = default;
+
+  bool Consume(IAaptContext* context, ResourceTable* table) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ResourceDeduper);
+};
+
+} // namespace aapt
+
+#endif  // AAPT_OPTIMIZE_RESOURCEDEDUPER_H