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diff --git a/clang-tools-extra/clang-modernize/ReplaceAutoPtr/ReplaceAutoPtr.h b/clang-tools-extra/clang-modernize/ReplaceAutoPtr/ReplaceAutoPtr.h
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+//===-- ReplaceAutoPtr.h ------------ std::auto_ptr replacement -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief This file provides the declaration of the ReplaceAutoPtrTransform
+/// class.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef CPP11_MIGRATE_REPLACE_AUTO_PTR_H
+#define CPP11_MIGRATE_REPLACE_AUTO_PTR_H
+
+#include "Core/Transform.h"
+#include "llvm/Support/Compiler.h"
+
+/// \brief Subclass of Transform that transforms the deprecated \c std::auto_ptr
+/// into the C++11 \c std::unique_ptr.
+///
+/// Note that both the \c std::auto_ptr type and the transfer of ownership are
+/// transformed. \c std::auto_ptr provides two ways to transfer the ownership,
+/// the copy-constructor and the assignment operator. Unlike most classes theses
+/// operations do not 'copy' the resource but they 'steal' it.
+/// \c std::unique_ptr uses move semantics instead, which makes the intent of
+/// transferring the resource explicit. This difference between the two smart
+/// pointers requires to wrap the copy-ctor and assign-operator with
+/// \c std::move().
+///
+/// For example, given:
+/// \code
+///   std::auto_ptr<int> i, j;
+///   i = j;
+/// \endcode
+/// the code is transformed to:
+/// \code
+///   std::unique_ptr<int> i, j;
+///   i = std::move(j);
+/// \endcode
+class ReplaceAutoPtrTransform : public Transform {
+public:
+  ReplaceAutoPtrTransform(const TransformOptions &Options)
+      : Transform("ReplaceAutoPtr", Options) {}
+
+  /// \see Transform::run().
+  virtual int apply(const FileOverrides &InputStates,
+                    const clang::tooling::CompilationDatabase &Database,
+                    const std::vector<std::string> &SourcePaths) LLVM_OVERRIDE;
+};
+
+#endif // CPP11_MIGRATE_REPLACE_AUTO_PTR_H