Reland of Move video_encoder.h and video_decoder.h to /api and create GN targets for them

webrtc/video/replay.cc

 /*
  *  Copyright (c) 2014 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.
  */
 
 #include <stdio.h>
 
 #include <map>
 #include <memory>
 #include <sstream>
 
 #include "gflags/gflags.h"
+#include "webrtc/api/video_codecs/video_decoder.h"
 #include "webrtc/base/checks.h"
 #include "webrtc/call/call.h"
 #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
 #include "webrtc/logging/rtc_event_log/rtc_event_log.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_header_parser.h"
 #include "webrtc/system_wrappers/include/clock.h"
 #include "webrtc/system_wrappers/include/sleep.h"
 #include "webrtc/test/encoder_settings.h"
 #include "webrtc/test/fake_decoder.h"
 #include "webrtc/test/gtest.h"
 #include "webrtc/test/null_transport.h"
 #include "webrtc/test/rtp_file_reader.h"
 #include "webrtc/test/run_loop.h"
 #include "webrtc/test/run_test.h"
 #include "webrtc/test/video_capturer.h"
 #include "webrtc/test/video_renderer.h"
 #include "webrtc/typedefs.h"
-#include "webrtc/video_decoder.h"
 
 namespace webrtc {
 namespace flags {
 
 // TODO(pbos): Multiple receivers.
 
 // Flag for payload type.
 static bool ValidatePayloadType(const char* flagname, int32_t payload_type) {
   return payload_type > 0 && payload_type <= 127;
 }
@@ skipping 281 matching lines @@
 }
 }  // namespace webrtc
 
 int main(int argc, char* argv[]) {
   ::testing::InitGoogleTest(&argc, argv);
   google::ParseCommandLineFlags(&argc, &argv, true);
 
   webrtc::test::RunTest(webrtc::RtpReplay);
   return 0;
 }