This CL removes all usages of our custom ostream << overloads.

This prepares us for removing them altogether.

Bug: webrtc:8982
Change-Id: I66002cc8d4bf0e07925766d568d2498422f0f38e
Reviewed-on: https://webrtc-review.googlesource.com/64142
Commit-Queue: Jonas Olsson <jonasolsson@webrtc.org>
Reviewed-by: Henrik Grunell <henrikg@webrtc.org>
Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org>
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22707}
diff --git a/modules/audio_coding/acm2/acm_receiver.cc b/modules/audio_coding/acm2/acm_receiver.cc
index 0d5dcae..4d0209b 100644
--- a/modules/audio_coding/acm2/acm_receiver.cc
+++ b/modules/audio_coding/acm2/acm_receiver.cc
@@ -26,6 +26,7 @@
 #include "rtc_base/format_macros.h"
 #include "rtc_base/logging.h"
 #include "rtc_base/numerics/safe_conversions.h"
+#include "rtc_base/strings/audio_format_to_string.h"
 #include "system_wrappers/include/clock.h"
 
 namespace webrtc {
@@ -260,7 +261,8 @@
       neteq_->RegisterPayloadType(rtp_payload_type, audio_format);
   if (!success) {
     RTC_LOG(LERROR) << "AcmReceiver::AddCodec failed for payload type "
-                    << rtp_payload_type << ", decoder format " << audio_format;
+                    << rtp_payload_type << ", decoder format "
+                    << rtc::ToString(audio_format);
   }
   return success;
 }