Adopt absl::string_view in modules/audio_processing/

Bug: webrtc:13579
Change-Id: Idb05a64cfd16aed68d40cd427a6b516caa5e2077
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/269387
Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
Commit-Queue: Ali Tofigh <alito@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37800}
diff --git a/modules/audio_processing/test/wav_based_simulator.h b/modules/audio_processing/test/wav_based_simulator.h
index ff88fd5..44e9ee2 100644
--- a/modules/audio_processing/test/wav_based_simulator.h
+++ b/modules/audio_processing/test/wav_based_simulator.h
@@ -13,6 +13,7 @@
 
 #include <vector>
 
+#include "absl/strings/string_view.h"
 #include "modules/audio_processing/test/audio_processing_simulator.h"
 
 namespace webrtc {
@@ -51,7 +52,7 @@
   void PrepareReverseProcessStreamCall();
   static std::vector<SimulationEventType> GetDefaultEventChain();
   static std::vector<SimulationEventType> GetCustomEventChain(
-      const std::string& filename);
+      absl::string_view filename);
 
   std::vector<SimulationEventType> call_chain_;
 };