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

webrtc/modules/audio_processing/vad/pole_zero_filter_unittest.cc

Index: webrtc/modules/audio_processing/vad/pole_zero_filter_unittest.cc
diff --git a/webrtc/modules/audio_processing/vad/pole_zero_filter_unittest.cc b/webrtc/modules/audio_processing/vad/pole_zero_filter_unittest.cc
index 492c3f0c94b5e6af113dbd685c5bcea517273a60..b3a0eb01071cdea767c1420feb033eca7b9a7926 100644
--- a/webrtc/modules/audio_processing/vad/pole_zero_filter_unittest.cc
+++ b/webrtc/modules/audio_processing/vad/pole_zero_filter_unittest.cc
@@ -13,8 +13,9 @@
 #include <math.h>
 #include <stdio.h>
 
+#include <memory>
+
 #include "testing/gtest/include/gtest/gtest.h"
-#include "webrtc/base/scoped_ptr.h"
 #include "webrtc/modules/audio_processing/vad/vad_audio_proc_internal.h"
 #include "webrtc/test/testsupport/fileutils.h"
 
@@ -58,7 +59,7 @@ class PoleZeroFilterTest : public ::testing::Test {
 
  private:
   void TestClean();
-  rtc::scoped_ptr<PoleZeroFilter> my_filter_;
+  std::unique_ptr<PoleZeroFilter> my_filter_;
 };
 
 void PoleZeroFilterTest::FilterSubframes(int num_subframes) {