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/accelerate.h b/webrtc/modules/audio_coding/neteq4/accelerate.h
index 375a6f0..83e3e38 100644
--- a/webrtc/modules/audio_coding/neteq4/accelerate.h
+++ b/webrtc/modules/audio_coding/neteq4/accelerate.h
@@ -43,7 +43,7 @@
   // the outcome of the operation as an enumerator value.
   ReturnCodes Process(const int16_t* input,
                       size_t input_length,
-                      AudioMultiVector<int16_t>* output,
+                      AudioMultiVector* output,
                       int16_t* length_change_samples);
 
  protected:
@@ -58,7 +58,7 @@
   virtual ReturnCodes CheckCriteriaAndStretch(
       const int16_t* input, size_t input_length, size_t peak_index,
       int16_t best_correlation, bool active_speech,
-      AudioMultiVector<int16_t>* output) const OVERRIDE;
+      AudioMultiVector* output) const OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Accelerate);