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/TestStereo.cc b/modules/audio_coding/test/TestStereo.cc
index d598191..eca81f8 100644
--- a/modules/audio_coding/test/TestStereo.cc
+++ b/modules/audio_coding/test/TestStereo.cc
@@ -108,8 +108,8 @@
 }
 
 TestStereo::TestStereo(int test_mode)
-    : acm_a_(AudioCodingModule::Create(0)),
-      acm_b_(AudioCodingModule::Create(1)),
+    : acm_a_(AudioCodingModule::Create()),
+      acm_b_(AudioCodingModule::Create()),
       channel_a2b_(NULL),
       test_cntr_(0),
       pack_size_samp_(0),