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/delay_test.cc b/modules/audio_coding/test/delay_test.cc
index 3f78ea6..407f709 100644
--- a/modules/audio_coding/test/delay_test.cc
+++ b/modules/audio_coding/test/delay_test.cc
@@ -64,8 +64,8 @@
 class DelayTest {
  public:
   DelayTest()
-      : acm_a_(AudioCodingModule::Create(0)),
-        acm_b_(AudioCodingModule::Create(1)),
+      : acm_a_(AudioCodingModule::Create()),
+        acm_b_(AudioCodingModule::Create()),
         channel_a2b_(new Channel),
         test_cntr_(0),
         encoding_sample_rate_hz_(8000) {}