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/api/audio_codecs/opus/BUILD.gn b/api/audio_codecs/opus/BUILD.gn
index af3cd7f..5552c21 100644
--- a/api/audio_codecs/opus/BUILD.gn
+++ b/api/audio_codecs/opus/BUILD.gn
@@ -46,6 +46,7 @@
     "../../../modules/audio_coding:webrtc_opus",
     "../../../rtc_base:rtc_base_approved",
     "../../../rtc_base/system:rtc_export",
+    "//third_party/abseil-cpp/absl/strings",
     "//third_party/abseil-cpp/absl/types:optional",
   ]
 }
@@ -59,11 +60,11 @@
   ]
   deps = [
     "..:audio_codecs_api",
-    "../../..:webrtc_common",
     "../../../modules/audio_coding:webrtc_opus",
     "../../../rtc_base:rtc_base_approved",
     "../../../rtc_base/system:rtc_export",
     "//third_party/abseil-cpp/absl/memory",
+    "//third_party/abseil-cpp/absl/strings",
     "//third_party/abseil-cpp/absl/types:optional",
   ]
 }
diff --git a/api/audio_codecs/opus/audio_decoder_opus.cc b/api/audio_codecs/opus/audio_decoder_opus.cc
index 41397f0..2f1668b 100644
--- a/api/audio_codecs/opus/audio_decoder_opus.cc
+++ b/api/audio_codecs/opus/audio_decoder_opus.cc
@@ -15,7 +15,7 @@
 #include <vector>
 
 #include "absl/memory/memory.h"
-#include "common_types.h"  // NOLINT(build/include)
+#include "absl/strings/match.h"
 #include "modules/audio_coding/codecs/opus/audio_decoder_opus.h"
 
 namespace webrtc {
@@ -35,7 +35,7 @@
     }
     return 1;  // Default to mono.
   }();
-  if (STR_CASE_CMP(format.name.c_str(), "opus") == 0 &&
+  if (absl::EqualsIgnoreCase(format.name, "opus") &&
       format.clockrate_hz == 48000 && format.num_channels == 2 &&
       num_channels) {
     return Config{*num_channels};