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diff --git a/gpu/np_utils/dynamic_np_object.h b/gpu/np_utils/dynamic_np_object.h
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+++ b/gpu/np_utils/dynamic_np_object.h
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+// Copyright (c) 2006-2008 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 GPU_NP_UTILS_DYNAMIC_NP_OBJECT_H_
+#define GPU_NP_UTILS_DYNAMIC_NP_OBJECT_H_
+
+#include <map>
+
+#include "gpu/np_utils/default_np_object.h"
+#include "gpu/np_utils/np_utils.h"
+
+namespace np_utils {
+
+// NPObjects of this type have a dictionary of property name / variant pairs
+// that can be changed at runtime through NPAPI.
+class DynamicNPObject : public DefaultNPObject<NPObject> {
+ public:
+  explicit DynamicNPObject(NPP npp);
+
+  void Invalidate();
+  bool HasProperty(NPIdentifier name);
+  bool GetProperty(NPIdentifier name, NPVariant* result);
+  bool SetProperty(NPIdentifier name, const NPVariant* value);
+  bool RemoveProperty(NPIdentifier name);
+  bool Enumerate(NPIdentifier** names, uint32_t* count);
+
+ private:
+  typedef std::map<NPIdentifier, SmartNPVariant> PropertyMap;
+  PropertyMap properties_;
+  DISALLOW_COPY_AND_ASSIGN(DynamicNPObject);
+};
+}  // namespace np_utils
+
+#endif  // GPU_NP_UTILS_DYNAMIC_NP_OBJECT_H_