NetEq4: Removing templatization for AudioMultiVector

This saves approx 6% runtime for neteq4_speed_test.
$ time out/Release/neteq4_speed_test --runtime_ms=50000000

BUG=1363
R=minyue@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2320006

git-svn-id: http://webrtc.googlecode.com/svn/trunk@4885 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_coding/neteq4/expand.cc b/webrtc/modules/audio_coding/neteq4/expand.cc
index 3d9fa38..b9157c3 100644
--- a/webrtc/modules/audio_coding/neteq4/expand.cc
+++ b/webrtc/modules/audio_coding/neteq4/expand.cc
@@ -34,7 +34,7 @@
   }
 }
 
-int Expand::Process(AudioMultiVector<int16_t>* output) {
+int Expand::Process(AudioMultiVector* output) {
   int16_t random_vector[kMaxSampleRate / 8000 * 120 + 30];
   int16_t scaled_random_vector[kMaxSampleRate / 8000 * 125];
   static const int kTempDataSize = 3600;