Adding iSAC-fb support

Adding tests, too.

Review URL: https://webrtc-codereview.appspot.com/1070011

git-svn-id: http://webrtc.googlecode.com/svn/trunk@3440 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_coding/neteq4/timestamp_scaler.cc b/webrtc/modules/audio_coding/neteq4/timestamp_scaler.cc
index 6bb22d5..d58d5dd 100644
--- a/webrtc/modules/audio_coding/neteq4/timestamp_scaler.cc
+++ b/webrtc/modules/audio_coding/neteq4/timestamp_scaler.cc
@@ -49,6 +49,7 @@
     }
     case kDecoderOpus:
     case kDecoderOpus_2ch:
+    case kDecoderISACfb:
     case kDecoderCNGswb48kHz: {
       // Use timestamp scaling with factor 2/3 (32 kHz sample rate, but RTP
       // timestamps run on 48 kHz).