Revert of New method StatsObserver::OnCompleteReports, passing ownership.

webrtc/sdk/android/src/jni/peerconnection_jni.cc

Index: webrtc/sdk/android/src/jni/peerconnection_jni.cc
diff --git a/webrtc/sdk/android/src/jni/peerconnection_jni.cc b/webrtc/sdk/android/src/jni/peerconnection_jni.cc
index c9c8ed35afaa57238fa10b602f02072cba736890..da552997758ae04e9e1cd15939e88ad446b7d74c 100644
--- a/webrtc/sdk/android/src/jni/peerconnection_jni.cc
+++ b/webrtc/sdk/android/src/jni/peerconnection_jni.cc
@@ -671,9 +671,9 @@
 
   virtual ~StatsObserverWrapper() {}
 
-  void OnCompleteReports(std::unique_ptr<StatsReports> reports) override {
+  void OnComplete(const StatsReports& reports) override {
     ScopedLocalRefFrame local_ref_frame(jni());
-    jobjectArray j_reports = ReportsToJava(jni(), *reports);
+    jobjectArray j_reports = ReportsToJava(jni(), reports);
     jmethodID m = GetMethodID(jni(), *j_observer_class_, "onComplete",
                               "([Lorg/webrtc/StatsReport;)V");
     jni()->CallVoidMethod(*j_observer_global_, m, j_reports);