Enable cpplint and fix cpplint errors in webrtc/*audio

webrtc/voice_engine/channel.cc

Index: webrtc/voice_engine/channel.cc
diff --git a/webrtc/voice_engine/channel.cc b/webrtc/voice_engine/channel.cc
index 66d66e6191cb8b0dc1db116738631764640e6a74..a9fe6fdfa52f8902259f4f146491f3355fc88ce2 100644
--- a/webrtc/voice_engine/channel.cc
+++ b/webrtc/voice_engine/channel.cc
@@ -675,7 +675,7 @@ MixerParticipant::AudioFrameInfo Channel::GetAudioFrameWithMuted(
   // Output volume scaling
   if (output_gain < 0.99f || output_gain > 1.01f) {
     // TODO(solenberg): Combine with mute state - this can cause clicks!
-    AudioFrameOperations::ScaleWithSat(output_gain, *audioFrame);
+    AudioFrameOperations::ScaleWithSat(output_gain, audioFrame);
   }
 
   // Mix decoded PCM output with file if file mixing is enabled