Delete use of STR_CASE_CMP, replaced with absl::EqualsIgnoreCase.

Bug: webrtc:5876
Change-Id: Ica2d47ca45b8ef01a548d8dbe31dbed740a0ebda
Reviewed-on: https://webrtc-review.googlesource.com/c/106820
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25306}
diff --git a/modules/audio_coding/test/TestRedFec.cc b/modules/audio_coding/test/TestRedFec.cc
index c56fed9..4866118 100644
--- a/modules/audio_coding/test/TestRedFec.cc
+++ b/modules/audio_coding/test/TestRedFec.cc
@@ -173,7 +173,7 @@
   auto encoder = encoder_factory_->MakeAudioEncoder(payload_type, codec_format,
                                                     absl::nullopt);
   EXPECT_NE(encoder, nullptr);
-  if (STR_CASE_CMP(codec_format.name.c_str(), "opus") != 0) {
+  if (!absl::EqualsIgnoreCase(codec_format.name, "opus")) {
     if (vad_mode.has_value()) {
       AudioEncoderCng::Config config;
       config.speech_encoder = std::move(encoder);