Adds scenario test framework.

Bug: webrtc:9510
Change-Id: I387aab4211f520a1c54832f82032ee724479e89e
Reviewed-on: https://webrtc-review.googlesource.com/89342
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24864}
diff --git a/test/scenario/hardware_codecs.h b/test/scenario/hardware_codecs.h
new file mode 100644
index 0000000..ae14a27
--- /dev/null
+++ b/test/scenario/hardware_codecs.h
@@ -0,0 +1,24 @@
+/*
+ *  Copyright 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+#ifndef TEST_SCENARIO_HARDWARE_CODECS_H_
+#define TEST_SCENARIO_HARDWARE_CODECS_H_
+
+#include <memory>
+
+#include "api/video_codecs/video_decoder_factory.h"
+#include "api/video_codecs/video_encoder_factory.h"
+
+namespace webrtc {
+namespace test {
+std::unique_ptr<VideoEncoderFactory> CreateHardwareEncoderFactory();
+std::unique_ptr<VideoDecoderFactory> CreateHardwareDecoderFactory();
+}  // namespace test
+}  // namespace webrtc
+#endif  // TEST_SCENARIO_HARDWARE_CODECS_H_