Moved injection of AudioDecoderFactory into voe::Channel.

Channel's API remains unchanged, but the creation of a BuiltinAudioDecoderFactory is now in Channel. The next step would be to amend Channel's API (through CreateChannel, I believe) to allow an AudioDecoderFactory to be sent along.

BUG=webrtc:5805

Review-Url: https://codereview.webrtc.org/1992763002
Cr-Commit-Position: refs/heads/master@{#12893}
diff --git a/webrtc/modules/audio_coding/neteq/neteq_unittest.cc b/webrtc/modules/audio_coding/neteq/neteq_unittest.cc
index 24a8774..d179367 100644
--- a/webrtc/modules/audio_coding/neteq/neteq_unittest.cc
+++ b/webrtc/modules/audio_coding/neteq/neteq_unittest.cc
@@ -24,6 +24,7 @@
 #include "testing/gtest/include/gtest/gtest.h"
 #include "webrtc/base/sha1digest.h"
 #include "webrtc/base/stringencode.h"
+#include "webrtc/modules/audio_coding/codecs/builtin_audio_decoder_factory.h"
 #include "webrtc/modules/audio_coding/neteq/tools/audio_loop.h"
 #include "webrtc/modules/audio_coding/neteq/tools/rtp_file_source.h"
 #include "webrtc/modules/audio_coding/codecs/pcm16b/pcm16b.h"
@@ -315,7 +316,7 @@
 }
 
 void NetEqDecodingTest::SetUp() {
-  neteq_ = NetEq::Create(config_);
+  neteq_ = NetEq::Create(config_, CreateBuiltinAudioDecoderFactory());
   NetEqNetworkStatistics stat;
   ASSERT_EQ(0, neteq_->NetworkStatistics(&stat));
   algorithmic_delay_ms_ = stat.current_buffer_size_ms;
@@ -1666,7 +1667,7 @@
   }
 
   void CreateSecondInstance() {
-    neteq2_.reset(NetEq::Create(config2_));
+    neteq2_.reset(NetEq::Create(config2_, CreateBuiltinAudioDecoderFactory()));
     ASSERT_TRUE(neteq2_);
     LoadDecoders(neteq2_.get());
   }