Initial upload of NetEq4

This is the first public upload of the new NetEq, version 4.

It has been through extensive internal review during the course of
the project.

TEST=trybots

Review URL: https://webrtc-codereview.appspot.com/1073005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3425 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_coding/neteq4/expand_unittest.cc b/webrtc/modules/audio_coding/neteq4/expand_unittest.cc
new file mode 100644
index 0000000..a63ed14
--- /dev/null
+++ b/webrtc/modules/audio_coding/neteq4/expand_unittest.cc
@@ -0,0 +1,33 @@
+/*
+ *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+// Unit tests for Expand class.
+
+#include "webrtc/modules/audio_coding/neteq4/expand.h"
+
+#include "gtest/gtest.h"
+#include "webrtc/modules/audio_coding/neteq4/background_noise.h"
+#include "webrtc/modules/audio_coding/neteq4/random_vector.h"
+#include "webrtc/modules/audio_coding/neteq4/sync_buffer.h"
+
+namespace webrtc {
+
+TEST(Expand, CreateAndDestroy) {
+  int fs = 8000;
+  size_t channels = 1;
+  BackgroundNoise bgn(channels);
+  SyncBuffer sync_buffer(1, 1000);
+  RandomVector random_vector;
+  Expand expand(&bgn, &sync_buffer, &random_vector, fs, channels);
+}
+
+// TODO(hlundin): Write more tests.
+
+}  // namespace webrtc