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/audio_decoder.cc b/webrtc/modules/audio_coding/neteq4/audio_decoder.cc
index 3e9b464..5a745ff 100644
--- a/webrtc/modules/audio_coding/neteq4/audio_decoder.cc
+++ b/webrtc/modules/audio_coding/neteq4/audio_decoder.cc
@@ -30,6 +30,7 @@
 #endif
 #ifdef WEBRTC_CODEC_ISAC
     case kDecoderISACswb:
+    case kDecoderISACfb:
 #endif
 #ifdef WEBRTC_CODEC_PCM16
     case kDecoderPCM16B:
@@ -96,6 +97,7 @@
     }
 #ifdef WEBRTC_CODEC_ISAC
     case kDecoderISACswb:
+    case kDecoderISACfb:
 #endif
 #ifdef WEBRTC_CODEC_PCM16
     case kDecoderPCM16Bswb32kHz:
@@ -153,6 +155,8 @@
 #ifdef WEBRTC_CODEC_ISAC
     case kDecoderISACswb:
       return new AudioDecoderIsacSwb;
+    case kDecoderISACfb:
+      return new AudioDecoderIsacFb;
 #endif
 #ifdef WEBRTC_CODEC_PCM16
     case kDecoderPCM16B: