Revert of Replace the remaining scoped_ptr with unique_ptr in webrtc/modules/

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl_unittest.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl_unittest.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl_unittest.cc b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl_unittest.cc
index 7e0ac312c804df4cb4a0c67e135ed7c1f4397b93..708b9af1e09df24c773d05e767a03dc8d3021687 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl_unittest.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl_unittest.cc
@@ -9,7 +9,6 @@
  */
 
 #include <map>
-#include <memory>
 #include <set>
 
 #include "testing/gmock/include/gmock/gmock.h"
@@ -69,7 +68,7 @@
                size_t len,
                const PacketOptions& options) override {
     RTPHeader header;
-    std::unique_ptr<RtpHeaderParser> parser(RtpHeaderParser::Create());
+    rtc::scoped_ptr<RtpHeaderParser> parser(RtpHeaderParser::Create());
     EXPECT_TRUE(parser->Parse(static_cast<const uint8_t*>(data), len, &header));
     ++rtp_packets_sent_;
     last_rtp_header_ = header;
@@ -116,10 +115,10 @@
 
   RtcpPacketTypeCounter packets_sent_;
   RtcpPacketTypeCounter packets_received_;
-  std::unique_ptr<ReceiveStatistics> receive_statistics_;
+  rtc::scoped_ptr<ReceiveStatistics> receive_statistics_;
   SendTransport transport_;
   RtcpRttStatsTestImpl rtt_stats_;
-  std::unique_ptr<ModuleRtpRtcpImpl> impl_;
+  rtc::scoped_ptr<ModuleRtpRtcpImpl> impl_;
   uint32_t remote_ssrc_;
 
   void SetRemoteSsrc(uint32_t ssrc) {