Replace RTC_FALLTHROUGH with ABSL_FALLTHROUGH_INTENTED

Bug: None
Change-Id: I7287403f3fb13b8e30f92ca3cf1882b03bb53a6e
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/166176
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30283}

api/video/BUILD.gn

@@ -58,9 +58,7 @@ rtc_library("video_frame") {
 
 rtc_source_set("recordable_encoded_frame") {
   visibility = [ "*" ]
-  sources = [
-    "recordable_encoded_frame.h",
-  ]
+  sources = [ "recordable_encoded_frame.h" ]
 
   deps = [
     ":encoded_image",
@@ -75,9 +73,7 @@ rtc_source_set("recordable_encoded_frame") {
 
 rtc_source_set("video_frame_type") {
   visibility = [ "*" ]
-  sources = [
-    "video_frame_type.h",
-  ]
+  sources = [ "video_frame_type.h" ]
 }
 
 rtc_library("video_frame_i420") {
@@ -146,16 +142,12 @@ rtc_library("encoded_frame") {
     "encoded_frame.h",
   ]
 
-  deps = [
-    "../../modules/video_coding:encoded_frame",
-  ]
+  deps = [ "../../modules/video_coding:encoded_frame" ]
 }
 
 rtc_source_set("video_codec_constants") {
   visibility = [ "*" ]
-  sources = [
-    "video_codec_constants.h",
-  ]
+  sources = [ "video_codec_constants.h" ]
   deps = []
 }
 
@@ -189,9 +181,7 @@ rtc_library("video_bitrate_allocator") {
 
 rtc_source_set("video_bitrate_allocator_factory") {
   visibility = [ "*" ]
-  sources = [
-    "video_bitrate_allocator_factory.h",
-  ]
+  sources = [ "video_bitrate_allocator_factory.h" ]
   deps = [
     ":video_bitrate_allocator",
     "../../rtc_base:rtc_base_approved",
@@ -201,9 +191,7 @@ rtc_source_set("video_bitrate_allocator_factory") {
 
 rtc_source_set("video_stream_decoder") {
   visibility = [ "*" ]
-  sources = [
-    "video_stream_decoder.h",
-  ]
+  sources = [ "video_stream_decoder.h" ]
 
   deps = [
     ":encoded_frame",
@@ -288,17 +276,15 @@ rtc_library("builtin_video_bitrate_allocator_factory") {
     "../../media:rtc_media_base",
     "../../modules/video_coding:video_coding_utility",
     "../../modules/video_coding:webrtc_vp9_helpers",
-    "../../rtc_base/system:fallthrough",
     "../video_codecs:video_codecs_api",
+    "//third_party/abseil-cpp/absl/base:core_headers",
   ]
 }
 
 if (rtc_include_tests) {
   rtc_library("video_unittests") {
     testonly = true
-    sources = [
-      "video_stream_decoder_create_unittest.cc",
-    ]
+    sources = [ "video_stream_decoder_create_unittest.cc" ]
     deps = [
       ":video_stream_decoder_create",
       "../../test:test_support",

api/video/builtin_video_bitrate_allocator_factory.cc

@@ -12,12 +12,12 @@
 
 #include <memory>
 
+#include "absl/base/macros.h"
 #include "api/video/video_bitrate_allocator.h"
 #include "api/video_codecs/video_codec.h"
 #include "modules/video_coding/codecs/vp9/svc_rate_allocator.h"
 #include "modules/video_coding/utility/default_video_bitrate_allocator.h"
 #include "modules/video_coding/utility/simulcast_rate_allocator.h"
-#include "rtc_base/system/fallthrough.h"
 
 namespace webrtc {
 
@@ -34,7 +34,7 @@ class BuiltinVideoBitrateAllocatorFactory
     std::unique_ptr<VideoBitrateAllocator> rate_allocator;
     switch (codec.codecType) {
       case kVideoCodecVP8:
-        RTC_FALLTHROUGH();
+        ABSL_FALLTHROUGH_INTENDED;
       case kVideoCodecH264:
         rate_allocator.reset(new SimulcastRateAllocator(codec));
         break;

api/video_codecs/BUILD.gn

@@ -58,12 +58,8 @@ rtc_library("video_codecs_api") {
 
 rtc_source_set("bitstream_parser_api") {
   visibility = [ "*" ]
-  sources = [
-    "bitstream_parser.h",
-  ]
-  deps = [
-    "..:array_view",
-  ]
+  sources = [ "bitstream_parser.h" ]
+  deps = [ "..:array_view" ]
 }
 
 rtc_library("builtin_video_decoder_factory") {
@@ -143,13 +139,13 @@ rtc_library("rtc_software_fallback_wrappers") {
     "../../modules/video_coding:video_codec_interface",
     "../../rtc_base:checks",
     "../../rtc_base:rtc_base_approved",
-    "../../rtc_base/system:fallthrough",
     "../../rtc_base/system:rtc_export",
     "../../system_wrappers:field_trial",
     "../video:encoded_image",
     "../video:video_bitrate_allocation",
     "../video:video_frame",
     "../video:video_rtp_headers",
+    "//third_party/abseil-cpp/absl/base:core_headers",
     "//third_party/abseil-cpp/absl/types:optional",
   ]
 }

api/video_codecs/video_decoder_software_fallback_wrapper.cc

@@ -16,12 +16,12 @@
 #include <string>
 #include <utility>
 
+#include "absl/base/macros.h"
 #include "api/video/encoded_image.h"
 #include "api/video_codecs/video_codec.h"
 #include "modules/video_coding/include/video_error_codes.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/logging.h"
-#include "rtc_base/system/fallthrough.h"
 #include "rtc_base/trace_event.h"
 #include "system_wrappers/include/field_trial.h"
 
@@ -166,7 +166,7 @@ int32_t VideoDecoderSoftwareFallbackWrapper::Decode(
       }
 
       // Fallback decoder initialized, fall-through.
-      RTC_FALLTHROUGH();
+      ABSL_FALLTHROUGH_INTENDED;
     }
     case DecoderType::kFallback:
       return fallback_decoder_->Decode(input_image, missing_frames,