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diff --git a/clang-tools-extra/cpp11-migrate/Core/FileOverrides.h b/clang-tools-extra/cpp11-migrate/Core/FileOverrides.h
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+//===-- Core/FileOverrides.h ------------------------------------*- 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 types and functionality for dealing with source
+/// and header file content overrides.
+///
+//===----------------------------------------------------------------------===//
+#ifndef CPP11_MIGRATE_FILE_OVERRIDES_H
+#define CPP11_MIGRATE_FILE_OVERRIDES_H
+
+#include <map>
+#include <string>
+
+// Forward Declarations
+namespace clang {
+class SourceManager;
+class FileManager;
+} // namespace clang
+
+
+/// \brief Container storing the file content overrides for a source file.
+struct SourceOverrides {
+  SourceOverrides(const char *MainFileName)
+      : MainFileName(MainFileName) {}
+
+  /// \brief Convenience function for applying this source's overrides to
+  /// the given SourceManager.
+  void applyOverrides(clang::SourceManager &SM, clang::FileManager &FM) const;
+
+  std::string MainFileName;
+  std::string MainFileOverride;
+};
+
+/// \brief Maps source file names to content override information.
+typedef std::map<std::string, SourceOverrides> FileOverrides;
+
+#endif // CPP11_MIGRATE_FILE_OVERRIDES_H