AcmReceiver: Eliminate AcmReceiver::decoders_

BUG=webrtc:5801

Review-Url: https://codereview.webrtc.org/2351183002
Cr-Commit-Position: refs/heads/master@{#14335}
diff --git a/webrtc/modules/audio_coding/neteq/timestamp_scaler.cc b/webrtc/modules/audio_coding/neteq/timestamp_scaler.cc
index 1f28639..fc3a846 100644
--- a/webrtc/modules/audio_coding/neteq/timestamp_scaler.cc
+++ b/webrtc/modules/audio_coding/neteq/timestamp_scaler.cc
@@ -50,7 +50,7 @@
       // support timestamp scaling of them.
       denominator_ = numerator_;
     } else {
-      denominator_ = info->GetFormat().clockrate_hz;
+      denominator_ = info->GetFormat()->clockrate_hz;
     }
   }
   if (numerator_ != denominator_) {