Unifying ChildProcessLauncher across platforms.

content/browser/file_descriptor_info_impl.cc

 // Copyright (c) 2012 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 "content/browser/file_descriptor_info_impl.h"
 
 #include <utility>
 
+#include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
 
 namespace content {
 
 // static
 std::unique_ptr<FileDescriptorInfo> FileDescriptorInfoImpl::Create() {
   return std::unique_ptr<FileDescriptorInfo>(new FileDescriptorInfoImpl());
 }
 
 FileDescriptorInfoImpl::FileDescriptorInfoImpl() {
@@ skipping 67 matching lines @@
   mapping_.push_back(std::make_pair(fd, id));
   if (region != base::MemoryMappedFile::Region::kWholeFile)
     ids_to_regions_[id] = region;
 }
 
 const base::FileHandleMappingVector& FileDescriptorInfoImpl::GetMapping()
     const {
   return mapping_;
 }
 
-base::FileHandleMappingVector
+std::unique_ptr<base::FileHandleMappingVector>
 FileDescriptorInfoImpl::GetMappingWithIDAdjustment(int delta) const {
-  base::FileHandleMappingVector result = mapping_;
+  std::unique_ptr<base::FileHandleMappingVector> result =
+      base::MakeUnique<base::FileHandleMappingVector>(mapping_);
   // Adding delta to each ID.
   for (unsigned i = 0; i < mapping_.size(); ++i)
-    result[i].second += delta;
+    (*result)[i].second += delta;
   return result;
 }
 
 }  // namespace content