Convert //chromecast from scoped_ptr to std::unique_ptr

chromecast/common/media/shared_memory_chunk.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromecast/common/media/shared_memory_chunk.h"
 
 #include <utility>
 
 #include "base/memory/shared_memory.h"
 
 namespace chromecast {
 namespace media {
 
-SharedMemoryChunk::SharedMemoryChunk(scoped_ptr<base::SharedMemory> shared_mem,
-                                     size_t size)
+SharedMemoryChunk::SharedMemoryChunk(
+    std::unique_ptr<base::SharedMemory> shared_mem,
+    size_t size)
     : shared_mem_(std::move(shared_mem)), size_(size) {}
 
 SharedMemoryChunk::~SharedMemoryChunk() {
 }
 
 void* SharedMemoryChunk::data() const {
   return shared_mem_->memory();
 }
 
 size_t SharedMemoryChunk::size() const {
   return size_;
 }
 
 bool SharedMemoryChunk::valid() const {
   return true;
 }
 
 }  // namespace media
 }  // namespace chromecast