Replace scoped_ptr with unique_ptr in webrtc/modules/audio_coding/neteq/

BUG=webrtc:5520

Review URL: https://codereview.webrtc.org/1697823002

Cr-Commit-Position: refs/heads/master@{#11616}
diff --git a/webrtc/modules/audio_coding/neteq/tools/packet.h b/webrtc/modules/audio_coding/neteq/tools/packet.h
index 8e43633..86eedc0 100644
--- a/webrtc/modules/audio_coding/neteq/tools/packet.h
+++ b/webrtc/modules/audio_coding/neteq/tools/packet.h
@@ -12,9 +12,9 @@
 #define WEBRTC_MODULES_AUDIO_CODING_NETEQ_TOOLS_PACKET_H_
 
 #include <list>
+#include <memory>
 
 #include "webrtc/base/constructormagic.h"
-#include "webrtc/base/scoped_ptr.h"
 #include "webrtc/common_types.h"
 #include "webrtc/typedefs.h"
 
@@ -103,7 +103,7 @@
   void CopyToHeader(RTPHeader* destination) const;
 
   RTPHeader header_;
-  rtc::scoped_ptr<uint8_t[]> payload_memory_;
+  std::unique_ptr<uint8_t[]> payload_memory_;
   const uint8_t* payload_;            // First byte after header.
   const size_t packet_length_bytes_;  // Total length of packet.
   size_t payload_length_bytes_;  // Length of the payload, after RTP header.