Remove rtc_base/scoped_ref_ptr.h.

The type rtc::scoped_refptr<T> is now part of api/. Please include it from
api/scoped_refptr.h.

More info: See: https://groups.google.com/forum/#!topic/discuss-webrtc/Mme2MSz4z4o.

Bug: webrtc:9887, webrtc:8205
No-Try: True
Change-Id: Ic6c7c81e226e59f12f7933e472f573ae097b55bf
Reviewed-on: https://webrtc-review.googlesource.com/c/119041
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26414}
diff --git a/test/frame_utils.h b/test/frame_utils.h
index c829311..9351584 100644
--- a/test/frame_utils.h
+++ b/test/frame_utils.h
@@ -12,7 +12,7 @@
 
 #include <stdint.h>
 
-#include "rtc_base/scoped_ref_ptr.h"
+#include "api/scoped_refptr.h"
 
 namespace webrtc {
 class I420Buffer;