Permanently switch to new openh264 include directory

Openh264 switched from api/svc to api/wels as the location for some
codec header files. During the transition it was necessary to
conditionally from either the old or new location, but now that the
switch is completed and has settled for about two weeks the conditionals
can be removed. This finishes the #include transition started by
webrtc-review.googlesource.com/c/280800

Bug: chromium:1218384
Change-Id: Ic0847428d134687908cc26fec1fdec0c612674b2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/281561
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Auto-Submit: Bruce Dawson <brucedawson@chromium.org>
Commit-Queue: Sergey Silkin <ssilkin@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38622}
diff --git a/modules/video_coding/BUILD.gn b/modules/video_coding/BUILD.gn
index 125a368..640d662 100644
--- a/modules/video_coding/BUILD.gn
+++ b/modules/video_coding/BUILD.gn
@@ -544,7 +544,6 @@
   if (rtc_use_h264) {
     deps += [
       "//third_party/ffmpeg",
-      "//third_party/openh264:buildflags",
       "//third_party/openh264:encoder",
     ]
     if (!build_with_mozilla) {
diff --git a/modules/video_coding/codecs/h264/h264_encoder_impl.cc b/modules/video_coding/codecs/h264/h264_encoder_impl.cc
index 5029dc9..3d9d629 100644
--- a/modules/video_coding/codecs/h264/h264_encoder_impl.cc
+++ b/modules/video_coding/codecs/h264/h264_encoder_impl.cc
@@ -31,19 +31,10 @@
 #include "system_wrappers/include/metrics.h"
 #include "third_party/libyuv/include/libyuv/convert.h"
 #include "third_party/libyuv/include/libyuv/scale.h"
-// TODO(crbug.com/1218384): Remove after new openh264 is rolled.
-#include "third_party/openh264/buildflags.h"
-#if BUILDFLAG(OPENH264_API_WELS)
 #include "third_party/openh264/src/codec/api/wels/codec_api.h"
 #include "third_party/openh264/src/codec/api/wels/codec_app_def.h"
 #include "third_party/openh264/src/codec/api/wels/codec_def.h"
 #include "third_party/openh264/src/codec/api/wels/codec_ver.h"
-#else
-#include "third_party/openh264/src/codec/api/svc/codec_api.h"
-#include "third_party/openh264/src/codec/api/svc/codec_app_def.h"
-#include "third_party/openh264/src/codec/api/svc/codec_def.h"
-#include "third_party/openh264/src/codec/api/svc/codec_ver.h"
-#endif
 
 namespace webrtc {
 
diff --git a/modules/video_coding/codecs/h264/h264_encoder_impl.h b/modules/video_coding/codecs/h264/h264_encoder_impl.h
index c1d8191..bf70c89 100644
--- a/modules/video_coding/codecs/h264/h264_encoder_impl.h
+++ b/modules/video_coding/codecs/h264/h264_encoder_impl.h
@@ -30,13 +30,7 @@
 #include "modules/video_coding/codecs/h264/include/h264.h"
 #include "modules/video_coding/svc/scalable_video_controller.h"
 #include "modules/video_coding/utility/quality_scaler.h"
-// TODO(crbug.com/1218384): Remove after new openh264 is rolled.
-#include "third_party/openh264/buildflags.h"
-#if BUILDFLAG(OPENH264_API_WELS)
 #include "third_party/openh264/src/codec/api/wels/codec_app_def.h"
-#else
-#include "third_party/openh264/src/codec/api/svc/codec_app_def.h"
-#endif
 
 class ISVCEncoder;