Replace scoped_ptr with unique_ptr everywhere

webrtc/base/optional.h

 /*
  *  Copyright 2015 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #ifndef WEBRTC_BASE_OPTIONAL_H_
 #define WEBRTC_BASE_OPTIONAL_H_
 
 #include <algorithm>
+#include <memory>
 #include <utility>
 
 #include "webrtc/base/checks.h"
 
 namespace rtc {
 
 // Simple std::experimental::optional-wannabe. It either contains a T or not.
 // In order to keep the implementation simple and portable, this implementation
 // actually contains a (default-constructed) T even when it supposedly doesn't
-// contain a value; use e.g. rtc::scoped_ptr<T> instead if that's too
+// contain a value; use e.g. std::unique_ptr<T> instead if that's too
 // expensive.
 //
 // A moved-from Optional<T> may only be destroyed, and assigned to if T allows
 // being assigned to after having been moved from. Specifically, you may not
 // assume that it just doesn't contain a value anymore.
 //
 // Examples of good places to use Optional:
 //
 // - As a class or struct member, when the member doesn't always have a value:
 //     struct Prisoner {
@@ skipping 88 matching lines @@
  private:
   // Invariant: Unless *this has been moved from, value_ is default-initialized
   // (or copied or moved from a default-initialized T) if !has_value_.
   T value_;
   bool has_value_;
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_OPTIONAL_H_