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diff --git a/gpu/np_utils/default_np_object.h b/gpu/np_utils/default_np_object.h
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+++ b/gpu/np_utils/default_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_DEFAULT_NP_OBJECT_H_
+#define GPU_NP_UTILS_DEFAULT_NP_OBJECT_H_
+
+#include "base/basictypes.h"
+#include "gpu/np_utils/np_headers.h"
+
+namespace np_utils {
+
+class BaseNPDispatcher;
+
+// This class implements each of the functions in the NPClass interface. They
+// all return error by default. Note that these are not virtual functions and
+// this is not an interface. This class can be used as a mixin so that an
+// NPObject class does not need to implement every NPClass function but rather
+// inherits a default from DefaultNPObject.
+template <typename RootClass>
+class DefaultNPObject : public RootClass {
+ public:
+  void Invalidate() {}
+
+  bool HasMethod(NPIdentifier name) {
+    return false;
+  }
+
+  bool Invoke(NPIdentifier name,
+              const NPVariant* args,
+              uint32_t num_args,
+              NPVariant* result) {
+    return false;
+  }
+
+  bool InvokeDefault(const NPVariant* args,
+                     uint32_t num_args,
+                     NPVariant* result) {
+    return false;
+  }
+
+  bool HasProperty(NPIdentifier name) {
+    return false;
+  }
+
+  bool GetProperty(NPIdentifier name, NPVariant* result) {
+    return false;
+  }
+
+  bool SetProperty(NPIdentifier name, const NPVariant* value) {
+    return false;
+  }
+
+  bool RemoveProperty(NPIdentifier name) {
+    return false;
+  }
+
+  bool Enumerate(NPIdentifier** names,
+                 uint32_t* count) {
+    *names = NULL;
+    *count = 0;
+    return true;
+  }
+
+  bool Construct(const NPVariant* args,
+                 uint32_t num_args,
+                 NPVariant* result) {
+    return false;
+  }
+
+  static BaseNPDispatcher* GetDispatcherChain() {
+    return NULL;
+  }
+
+ protected:
+  DefaultNPObject() {}
+  virtual ~DefaultNPObject() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(DefaultNPObject);
+};
+}  // namespace np_utils
+
+#endif  // GPU_NP_UTILS_DEFAULT_NP_OBJECT_H_