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diff --git a/externals/breakpad/src/common/tests/file_utils.h b/externals/breakpad/src/common/tests/file_utils.h
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+// Copyright 2011 Google LLC
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google LLC nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// file_utils.h: Define utility functions for file manipulation, which
+// are used for testing.
+
+#ifndef COMMON_TESTS_FILE_UTILS_H_
+#define COMMON_TESTS_FILE_UTILS_H_
+
+#include <string>
+
+namespace google_breakpad {
+
+// Copies a file from |from_path| to |to_path|. Returns true on success.
+bool CopyFile(const std::string& from_path, const std::string& to_path);
+bool CopyFile(const char* from_path, const char* to_path);
+
+// Reads the content of a file at |path| into |buffer|. |buffer_size| specifies
+// the size of |buffer| in bytes and returns the number of bytes read from the
+// file on success. Returns true on success.
+bool ReadFile(const char* path, void* buffer, ssize_t* buffer_size);
+
+// Writes |buffer_size| bytes of the content in |buffer| to a file at |path|.
+// Returns true on success.
+bool WriteFile(const char* path, const void* buffer, size_t buffer_size);
+
+}  // namespace google_breakpad
+
+#endif  // COMMON_TESTS_FILE_UTILS_H_