Original CL: https://codereview.webrtc.org/2433153003/, commit 8b8d3e4c30e8ea3846b58dfd36d1fd35a7799df4.
Revert CL: https://codereview.webrtc.org/2456333002/, commit 48dfab5c58119a4e65c52506ed55f8de79725bcf.

The new function on the APM interface is no longer pure virtual.

BUG=webrtc:6525
TBR=solenberg@webrtc.org,peah@webrtc.org

Review-Url: https://codereview.webrtc.org/2458993002
Cr-Commit-Position: refs/heads/master@{#14827}
diff --git a/webrtc/modules/audio_processing/audio_processing_impl.h b/webrtc/modules/audio_processing/audio_processing_impl.h
index fd8683f..5ab32ec 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.h
+++ b/webrtc/modules/audio_processing/audio_processing_impl.h
@@ -116,6 +116,8 @@
   bool was_stream_delay_set() const override
       EXCLUSIVE_LOCKS_REQUIRED(crit_capture_);
 
+  AudioProcessingStatistics GetStatistics() const override;
+
   // Methods returning pointers to APM submodules.
   // No locks are aquired in those, as those locks
   // would offer no protection (the submodules are