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diff --git a/media/libvpx/libvpx/third_party/googletest/src/include/gtest/internal/custom/gtest-port.h b/media/libvpx/libvpx/third_party/googletest/src/include/gtest/internal/custom/gtest-port.h
new file mode 100644
index 0000000000..9b7fb4261a
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+++ b/media/libvpx/libvpx/third_party/googletest/src/include/gtest/internal/custom/gtest-port.h
@@ -0,0 +1,68 @@
+// Copyright 2015, 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.
+//
+// Injection point for custom user configurations. See README for details
+//
+// ** Custom implementation starts here **
+
+#ifndef GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
+#define GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
+
+// Use a stub Notification class.
+//
+// The built-in Notification class in GoogleTest v1.12.1 uses std::mutex and
+// std::condition_variable. The <mutex> and <condition_variable> headers of
+// mingw32 g++ (GNU 10.0.0) define std::mutex and std::condition_variable only
+// when configured with the posix threads option but don't define them when
+// configured with the win32 threads option. The Notification class is only
+// used in GoogleTest's internal tests. Since we don't build GoogleTest's
+// internal tests, we don't need a working Notification class. Although it's
+// not hard to fix the mingw32 g++ compilation errors by implementing the
+// Notification class using Windows CRITICAL_SECTION and CONDITION_VARIABLE,
+// it's simpler to just use a stub Notification class on all platforms.
+//
+// The default constructor of the stub class is deleted and the declaration of
+// the Notify() method is commented out, so that compilation will fail if any
+// code actually uses the Notification class.
+
+#define GTEST_HAS_NOTIFICATION_ 1
+namespace testing {
+namespace internal {
+class Notification {
+ public:
+  Notification() = delete;
+  Notification(const Notification&) = delete;
+  Notification& operator=(const Notification&) = delete;
+  // void Notify();
+  void WaitForNotification() {}
+};
+}  // namespace internal
+}  // namespace testing
+
+#endif  // GOOGLETEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_