Replace scoped_ptr with unique_ptr in webrtc/modules/audio_processing/transient/

BUG=webrtc:5520

Review URL: https://codereview.webrtc.org/1698843003

Cr-Commit-Position: refs/heads/master@{#11645}
diff --git a/webrtc/modules/audio_processing/transient/click_annotate.cc b/webrtc/modules/audio_processing/transient/click_annotate.cc
index 38f7a8e..dd1c346 100644
--- a/webrtc/modules/audio_processing/transient/click_annotate.cc
+++ b/webrtc/modules/audio_processing/transient/click_annotate.cc
@@ -11,14 +11,13 @@
 #include <cfloat>
 #include <cstdio>
 #include <cstdlib>
+#include <memory>
 #include <vector>
 
 #include "webrtc/modules/audio_processing/transient/transient_detector.h"
 #include "webrtc/modules/audio_processing/transient/file_utils.h"
-#include "webrtc/base/scoped_ptr.h"
 #include "webrtc/system_wrappers/include/file_wrapper.h"
 
-using rtc::scoped_ptr;
 using webrtc::FileWrapper;
 using webrtc::TransientDetector;
 
@@ -40,14 +39,14 @@
     return 0;
   }
 
-  scoped_ptr<FileWrapper> pcm_file(FileWrapper::Create());
+  std::unique_ptr<FileWrapper> pcm_file(FileWrapper::Create());
   pcm_file->OpenFile(argv[1], true, false, false);
   if (!pcm_file->Open()) {
     printf("\nThe %s could not be opened.\n\n", argv[1]);
     return -1;
   }
 
-  scoped_ptr<FileWrapper> dat_file(FileWrapper::Create());
+  std::unique_ptr<FileWrapper> dat_file(FileWrapper::Create());
   dat_file->OpenFile(argv[2], false, false, false);
   if (!dat_file->Open()) {
     printf("\nThe %s could not be opened.\n\n", argv[2]);
@@ -69,7 +68,7 @@
   TransientDetector detector(sample_rate_hz);
   int lost_packets = 0;
   size_t audio_buffer_length = chunk_size_ms * sample_rate_hz / 1000;
-  scoped_ptr<float[]> audio_buffer(new float[audio_buffer_length]);
+  std::unique_ptr<float[]> audio_buffer(new float[audio_buffer_length]);
   std::vector<float> send_times;
 
   // Read first buffer from the PCM test file.