Remove various IDs:

- AudioFrame
- AudioCodingModule

BUG=webrtc:4690
TBR=kwiberg@webrtc.org

Review-Url: https://codereview.webrtc.org/3019543002
Cr-Commit-Position: refs/heads/master@{#20005}
diff --git a/modules/audio_coding/test/TestVADDTX.cc b/modules/audio_coding/test/TestVADDTX.cc
index 1aa00b5..628582d 100644
--- a/modules/audio_coding/test/TestVADDTX.cc
+++ b/modules/audio_coding/test/TestVADDTX.cc
@@ -62,8 +62,8 @@
 }
 
 TestVadDtx::TestVadDtx()
-    : acm_send_(AudioCodingModule::Create(0)),
-      acm_receive_(AudioCodingModule::Create(1)),
+    : acm_send_(AudioCodingModule::Create()),
+      acm_receive_(AudioCodingModule::Create()),
       channel_(new Channel),
       monitor_(new ActivityMonitor) {
   EXPECT_EQ(0, acm_send_->RegisterTransportCallback(channel_.get()));