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/preemptive_expand.h b/webrtc/modules/audio_coding/neteq4/preemptive_expand.h
index 1bb610f..4cd92cc 100644
--- a/webrtc/modules/audio_coding/neteq4/preemptive_expand.h
+++ b/webrtc/modules/audio_coding/neteq4/preemptive_expand.h
@@ -46,7 +46,7 @@
   ReturnCodes Process(const int16_t *pw16_decoded,
                       int len,
                       int old_data_len,
-                      AudioMultiVector<int16_t>* output,
+                      AudioMultiVector* output,
                       int16_t* length_change_samples);
 
  protected:
@@ -61,7 +61,7 @@
   virtual ReturnCodes CheckCriteriaAndStretch(
       const int16_t *pw16_decoded, size_t len, size_t w16_bestIndex,
       int16_t w16_bestCorr, bool w16_VAD,
-      AudioMultiVector<int16_t>* output) const;
+      AudioMultiVector* output) const;
 
  private:
   int old_data_length_per_channel_;