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/modules/audio_processing/audio_processing_impl_unittest.cc b/modules/audio_processing/audio_processing_impl_unittest.cc
index c511cb3..abceeec 100644
--- a/modules/audio_processing/audio_processing_impl_unittest.cc
+++ b/modules/audio_processing/audio_processing_impl_unittest.cc
@@ -13,12 +13,12 @@
 #include <memory>
 
 #include "absl/memory/memory.h"
+#include "api/scoped_refptr.h"
 #include "modules/audio_processing/include/audio_processing.h"
 #include "modules/audio_processing/test/echo_control_mock.h"
 #include "modules/audio_processing/test/test_utils.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/ref_counted_object.h"
-#include "rtc_base/scoped_ref_ptr.h"
 #include "test/gmock.h"
 #include "test/gtest.h"