Remove usage of deprecated header in WebRTC

content/renderer/media/gpu/rtc_video_encoder_unittest.cc

Index: content/renderer/media/gpu/rtc_video_encoder_unittest.cc
diff --git a/content/renderer/media/gpu/rtc_video_encoder_unittest.cc b/content/renderer/media/gpu/rtc_video_encoder_unittest.cc
index 72154004e42d41f90a63dd883f77b561ccb83788..c4a170e42f7358292dd2c61713f7ca7753c36d15 100644
--- a/content/renderer/media/gpu/rtc_video_encoder_unittest.cc
+++ b/content/renderer/media/gpu/rtc_video_encoder_unittest.cc
@@ -14,8 +14,8 @@
 #include "media/video/mock_video_encode_accelerator.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/libyuv/include/libyuv/planar_functions.h"
+#include "third_party/webrtc/api/video_codecs/video_encoder.h"
 #include "third_party/webrtc/modules/video_coding/include/video_codec_interface.h"
-#include "third_party/webrtc/video_encoder.h"
 
 using ::testing::_;
 using ::testing::AtLeast;