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diff --git a/toolkit/crashreporter/google-breakpad/src/common/unordered.h b/toolkit/crashreporter/google-breakpad/src/common/unordered.h
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+++ b/toolkit/crashreporter/google-breakpad/src/common/unordered.h
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+// Copyright (c) 2010 Google Inc.
+// All rights reserved.
+//
+// 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 Inc. 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.
+
+// Include this file to use unordered_map and unordered_set.  If tr1
+// or C++11 is not available, you can switch to using hash_set and
+// hash_map by defining BP_USE_HASH_SET.
+
+#ifndef COMMON_UNORDERED_H_
+#define COMMON_UNORDERED_H_
+
+#if defined(BP_USE_HASH_SET)
+#include <hash_map>
+#include <hash_set>
+
+// For hash<string>.
+#include "util/hash/hash.h"
+
+template <class T, class U, class H = __gnu_cxx::hash<T> >
+struct unordered_map : public hash_map<T, U, H> {};
+template <class T, class H = __gnu_cxx::hash<T> >
+struct unordered_set : public hash_set<T, H> {};
+
+#elif defined(_LIBCPP_VERSION)  // c++11
+#include <unordered_map>
+#include <unordered_set>
+using std::unordered_map;
+using std::unordered_set;
+
+#else  // Fallback to tr1::unordered
+#include <tr1/unordered_map>
+#include <tr1/unordered_set>
+using std::tr1::unordered_map;
+using std::tr1::unordered_set;
+#endif
+
+#endif  // COMMON_UNORDERED_H_