Revert "Make VoiceEngine choose ACM2 by default"

The reason for reverting is that Issue 3143 should be resolved
first.

TBR=henrika@webrtc.org
BUG=3143

Review URL: https://webrtc-codereview.appspot.com/12119005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5926 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/voice_engine/voice_engine_impl.cc b/voice_engine/voice_engine_impl.cc
index 52882f5..2f524bb 100644
--- a/voice_engine/voice_engine_impl.cc
+++ b/voice_engine/voice_engine_impl.cc
@@ -86,7 +86,7 @@
 
 VoiceEngine* VoiceEngine::Create() {
   Config* config = new Config();
-  config->Set<AudioCodingModuleFactory>(new NewAudioCodingModuleFactory());
+  config->Set<AudioCodingModuleFactory>(new AudioCodingModuleFactory());
 
   return GetVoiceEngine(config, true);
 }