Re-write many calls to WrapUnique() with MakeUnique()

components/metrics/file_metrics_provider.cc

 // Copyright 2016 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 "components/metrics/file_metrics_provider.h"
 
 #include "base/command_line.h"
 #include "base/files/file.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_util.h"
@@ skipping 307 matching lines @@
 
   // Test the validity of the file contents.
   const bool read_only = kSourceOptions[source->type].is_read_only;
   if (!base::FilePersistentMemoryAllocator::IsFileAcceptable(*mapped,
                                                              read_only)) {
     return ACCESS_RESULT_INVALID_CONTENTS;
   }
 
   // Create an allocator for the mapped file. Ownership passes to the allocator.
   source->allocator.reset(new base::PersistentHistogramAllocator(
-      base::WrapUnique(new base::FilePersistentMemoryAllocator(
-          std::move(mapped), 0, 0, base::StringPiece(), read_only))));
+      base::MakeUnique<base::FilePersistentMemoryAllocator>(
+          std::move(mapped), 0, 0, base::StringPiece(), read_only)));
 
   return ACCESS_RESULT_SUCCESS;
 }
 
 // static
 void FileMetricsProvider::MergeHistogramDeltasFromSource(SourceInfo* source) {
   DCHECK(source->allocator);
   base::PersistentHistogramAllocator::Iterator histogram_iter(
       source->allocator.get());
 
@@ skipping 204 matching lines @@
 
     // Dump all histograms contained within the source to the snapshot-manager.
     RecordHistogramSnapshotsFromSource(snapshot_manager, source.get());
 
     // Update the last-seen time so it isn't read again unless it changes.
     RecordSourceAsRead(source.get());
   }
 }
 
 }  // namespace metrics