Revert of Replace scoped_ptr with unique_ptr in webrtc/common_audio/

webrtc/common_audio/blocker_unittest.cc

Index: webrtc/common_audio/blocker_unittest.cc
diff --git a/webrtc/common_audio/blocker_unittest.cc b/webrtc/common_audio/blocker_unittest.cc
index eea3e2516a08db71bbc1760975b4b5ffb7b9a307..a5a7b56282f7362260358140864b25913dd2bbb3 100644
--- a/webrtc/common_audio/blocker_unittest.cc
+++ b/webrtc/common_audio/blocker_unittest.cc
@@ -7,8 +7,6 @@
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
-
-#include <memory>
 
 #include "webrtc/common_audio/blocker.h"
 
@@ -309,7 +307,7 @@
   CopyBlockerCallback callback;
 
   for (size_t i = 0; i < arraysize(kChunkSize); ++i) {
-    std::unique_ptr<float[]> window(new float[kBlockSize[i]]);
+    rtc::scoped_ptr<float[]> window(new float[kBlockSize[i]]);
     for (size_t j = 0; j < kBlockSize[i]; ++j) {
       window[j] = 1.f;
     }