Revert Make the new jitter buffer the default jitter buffer.

Speculative revert of https://codereview.chromium.org/2656983002/ to see if it fixes a downstream bug.

BUG=webrtc:5514

Review-Url: https://codereview.webrtc.org/2682073003
Cr-Commit-Position: refs/heads/master@{#16492}
diff --git a/webrtc/modules/video_coding/timing.h b/webrtc/modules/video_coding/timing.h
index 429c282..e7d2b1f 100644
--- a/webrtc/modules/video_coding/timing.h
+++ b/webrtc/modules/video_coding/timing.h
@@ -94,13 +94,13 @@
 
   // Return current timing information. Returns true if the first frame has been
   // decoded, false otherwise.
-  virtual bool GetTimings(int* decode_ms,
-                          int* max_decode_ms,
-                          int* current_delay_ms,
-                          int* target_delay_ms,
-                          int* jitter_buffer_ms,
-                          int* min_playout_delay_ms,
-                          int* render_delay_ms) const;
+  bool GetTimings(int* decode_ms,
+                  int* max_decode_ms,
+                  int* current_delay_ms,
+                  int* target_delay_ms,
+                  int* jitter_buffer_ms,
+                  int* min_playout_delay_ms,
+                  int* render_delay_ms) const;
 
   enum { kDefaultRenderDelayMs = 10 };
   enum { kDelayMaxChangeMsPerS = 100 };