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

webrtc/media/engine/webrtcvideoengine2_unittest.cc

 /*
  *  Copyright (c) 2004 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 <algorithm>
 #include <map>
 #include <memory>
 #include <vector>
 
+#include "webrtc/api/video_codecs/video_encoder.h"
 #include "webrtc/base/arraysize.h"
 #include "webrtc/base/gunit.h"
 #include "webrtc/base/stringutils.h"
 #include "webrtc/call/flexfec_receive_stream.h"
 #include "webrtc/common_video/h264/profile_level_id.h"
 #include "webrtc/logging/rtc_event_log/rtc_event_log.h"
 #include "webrtc/media/base/mediaconstants.h"
 #include "webrtc/media/base/rtputils.h"
 #include "webrtc/media/base/testutils.h"
 #include "webrtc/media/base/videoengine_unittest.h"
 #include "webrtc/media/engine/constants.h"
 #include "webrtc/media/engine/fakewebrtccall.h"
 #include "webrtc/media/engine/fakewebrtcvideoengine.h"
 #include "webrtc/media/engine/simulcast.h"
 #include "webrtc/media/engine/webrtcvideoengine2.h"
 #include "webrtc/media/engine/webrtcvoiceengine.h"
 #include "webrtc/test/field_trial.h"
-#include "webrtc/video_encoder.h"
 
 using webrtc::RtpExtension;
 
 namespace {
 static const int kDefaultQpMax = 56;
 
 static const uint8_t kRedRtxPayloadType = 125;
 
 static const uint32_t kSsrcs1[] = {1};
 static const uint32_t kSsrcs3[] = {1, 2, 3};
@@ skipping 3752 matching lines @@
 
 TEST_F(WebRtcVideoChannel2Test, RedRtxPacketDoesntCreateUnsignalledStream) {
   TestReceiveUnsignaledSsrcPacket(kRedRtxPayloadType,
                                   false /* expect_created_receive_stream */);
 }
 
 // Test that receiving any unsignalled SSRC works even if it changes.
 // The first unsignalled SSRC received will create a default receive stream.
 // Any different unsignalled SSRC received will replace the default.
 TEST_F(WebRtcVideoChannel2Test, ReceiveDifferentUnsignaledSsrc) {
-
   // Allow receiving VP8, VP9, H264 (if enabled).
   cricket::VideoRecvParameters parameters;
   parameters.codecs.push_back(GetEngineCodec("VP8"));
   parameters.codecs.push_back(GetEngineCodec("VP9"));
 
 #if defined(WEBRTC_USE_H264)
   cricket::VideoCodec H264codec(126, "H264");
   parameters.codecs.push_back(H264codec);
 #endif
 
@@ skipping 575 matching lines @@
 
 TEST_F(WebRtcVideoChannel2SimulcastTest,
        NoSimulcastScreenshareWithoutConference) {
   webrtc::test::ScopedFieldTrials override_field_trials_(
       "WebRTC-SimulcastScreenshare/Enabled/");
   VerifySimulcastSettings(cricket::VideoCodec("VP8"), 1280, 720, 3, 1, true,
                           false);
 }
 
 }  // namespace cricket