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.cc b/webrtc/modules/audio_coding/neteq4/preemptive_expand.cc
index 195315f..ac787eb 100644
--- a/webrtc/modules/audio_coding/neteq4/preemptive_expand.cc
+++ b/webrtc/modules/audio_coding/neteq4/preemptive_expand.cc
@@ -20,7 +20,7 @@
     const int16_t* input,
     int input_length,
     int old_data_length,
-    AudioMultiVector<int16_t>* output,
+    AudioMultiVector* output,
     int16_t* length_change_samples) {
   old_data_length_per_channel_ = old_data_length;
   // Input length must be (almost) 30 ms.
@@ -56,7 +56,7 @@
 PreemptiveExpand::ReturnCodes PreemptiveExpand::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 {
+    AudioMultiVector* output) const {
   // Pre-calculate common multiplication with |fs_mult_|.
   // 120 corresponds to 15 ms.
   int fs_mult_120 = fs_mult_ * 120;
@@ -75,7 +75,7 @@
     output->PushBackInterleaved(
         input, (unmodified_length + peak_index) * num_channels_);
     // Copy the last |peak_index| samples up to 15 ms to |temp_vector|.
-    AudioMultiVector<int16_t> temp_vector(num_channels_);
+    AudioMultiVector temp_vector(num_channels_);
     temp_vector.PushBackInterleaved(
         &input[(unmodified_length - peak_index) * num_channels_],
         peak_index * num_channels_);