Moved injection of AudioDecoderFactory into voe::Channel.

webrtc/modules/audio_coding/acm2/acm_receiver_unittest_oldapi.cc

Index: webrtc/modules/audio_coding/acm2/acm_receiver_unittest_oldapi.cc
diff --git a/webrtc/modules/audio_coding/acm2/acm_receiver_unittest_oldapi.cc b/webrtc/modules/audio_coding/acm2/acm_receiver_unittest_oldapi.cc
index b57b7ef446e61c4c3f92ae4295296249d871eeae..174fff799a6eb36dddb89bf7611b0d5cd9563d11 100644
--- a/webrtc/modules/audio_coding/acm2/acm_receiver_unittest_oldapi.cc
+++ b/webrtc/modules/audio_coding/acm2/acm_receiver_unittest_oldapi.cc
@@ -18,6 +18,7 @@
 #include "webrtc/base/safe_conversions.h"
 #include "webrtc/modules/audio_coding/include/audio_coding_module.h"
 #include "webrtc/modules/audio_coding/acm2/audio_coding_module_impl.h"
+#include "webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.h"
 #include "webrtc/modules/audio_coding/neteq/tools/rtp_generator.h"
 #include "webrtc/system_wrappers/include/clock.h"
 #include "webrtc/test/test_suite.h"
@@ -60,6 +61,7 @@ class AcmReceiverTestOldApi : public AudioPacketizationCallback,
         packet_sent_(false),
         last_packet_send_timestamp_(timestamp_),
         last_frame_type_(kEmptyFrame) {
+    config_.decoder_factory = CreateBuiltinAudioDecoderFactory();
   }
 
   ~AcmReceiverTestOldApi() {}