Adopt absl::string_view in modules/audio_coding/

Bug: webrtc:13579
Change-Id: Ifec66fb6ba9724d18539de7245a358c2d13c7939
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/268547
Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Commit-Queue: Ali Tofigh <alito@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37573}
diff --git a/modules/audio_coding/acm2/audio_coding_module.cc b/modules/audio_coding/acm2/audio_coding_module.cc
index e2081e2..4367ab0 100644
--- a/modules/audio_coding/acm2/audio_coding_module.cc
+++ b/modules/audio_coding/acm2/audio_coding_module.cc
@@ -14,6 +14,7 @@
 #include <cstdint>
 
 #include "absl/strings/match.h"
+#include "absl/strings/string_view.h"
 #include "api/array_view.h"
 #include "modules/audio_coding/acm2/acm_receiver.h"
 #include "modules/audio_coding/acm2/acm_remixing.h"
@@ -112,7 +113,7 @@
   // the value has changed since the last time (and always for the first call).
   class ChangeLogger {
    public:
-    explicit ChangeLogger(const std::string& histogram_name)
+    explicit ChangeLogger(absl::string_view histogram_name)
         : histogram_name_(histogram_name) {}
     // Logs the new value if it is different from the last logged value, or if
     // this is the first call.
@@ -135,7 +136,7 @@
 
   int InitializeReceiverSafe() RTC_EXCLUSIVE_LOCKS_REQUIRED(acm_mutex_);
 
-  bool HaveValidEncoder(const char* caller_name) const
+  bool HaveValidEncoder(absl::string_view caller_name) const
       RTC_EXCLUSIVE_LOCKS_REQUIRED(acm_mutex_);
 
   // Preprocessing of input audio, including resampling and down-mixing if
@@ -589,7 +590,8 @@
   return 0;
 }
 
-bool AudioCodingModuleImpl::HaveValidEncoder(const char* caller_name) const {
+bool AudioCodingModuleImpl::HaveValidEncoder(
+    absl::string_view caller_name) const {
   if (!encoder_stack_) {
     RTC_LOG(LS_ERROR) << caller_name << " failed: No send codec is registered.";
     return false;