[NOT FOR REVIEW] Convert channel counts to size_t.

webrtc/modules/audio_coding/main/acm2/codec_manager.cc

Index: webrtc/modules/audio_coding/main/acm2/codec_manager.cc
diff --git a/webrtc/modules/audio_coding/main/acm2/codec_manager.cc b/webrtc/modules/audio_coding/main/acm2/codec_manager.cc
index 7b9c7ed5a949db37b8dbd842a1389fd99efbf479..a422e6fb7d9e5de85a36a267e40c8a12265d8fb7 100644
--- a/webrtc/modules/audio_coding/main/acm2/codec_manager.cc
+++ b/webrtc/modules/audio_coding/main/acm2/codec_manager.cc
@@ -11,6 +11,7 @@
 #include "webrtc/modules/audio_coding/main/acm2/codec_manager.h"
 
 #include "webrtc/base/checks.h"
+#include "webrtc/base/format_macros.h"
 #include "webrtc/engine_configurations.h"
 #include "webrtc/modules/audio_coding/main/acm2/acm_codec_database.h"
 #include "webrtc/system_wrappers/interface/trace.h"
@@ -40,8 +41,8 @@ int IsValidSendCodec(const CodecInst& send_codec, bool is_primary_encoder) {
   int dummy_id = 0;
   if ((send_codec.channels != 1) && (send_codec.channels != 2)) {
     WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, dummy_id,
-                 "Wrong number of channels (%d, only mono and stereo are "
-                 "supported) for %s encoder",
+                 "Wrong number of channels (%" PRIuS ", only mono and stereo "
+                 "are supported) for %s encoder",
                  send_codec.channels,
                  is_primary_encoder ? "primary" : "secondary");
     return -1;
@@ -74,7 +75,7 @@ int IsValidSendCodec(const CodecInst& send_codec, bool is_primary_encoder) {
   if (ACMCodecDB::codec_settings_[codec_id].channel_support <
       send_codec.channels) {
     WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceAudioCoding, dummy_id,
-                 "%d number of channels not supportedn for %s.",
+                 "%" PRIuS " number of channels not supportedn for %s.",
                  send_codec.channels, send_codec.plname);
     return -1;
   }