Remove a scoped_refptr<>::swap overload

net/disk_cache/blockfile/block_files.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 "net/disk_cache/blockfile/block_files.h"
 
 #include <limits>
 
 #include "base/atomicops.h"
 #include "base/files/file_path.h"
@@ skipping 497 matching lines @@
   }
 
   if (index == 0) {
     // Load the links file into memory.
     if (!file->Preload())
       return false;
   }
 
   ScopedFlush flush(file.get());
   DCHECK(!block_files_[index]);
-  file.swap(&block_files_[index]);
+  block_files_[index] = file.get();
+  file->AddRef();
   return true;
 }
 
 bool BlockFiles::GrowBlockFile(MappedFile* file, BlockFileHeader* header) {
   if (kMaxBlocks == header->max_entries)
     return false;
 
   ScopedFlush flush(file);
   DCHECK(!header->empty[3]);
   int new_size = header->max_entries + 1024;
@@ skipping 195 matching lines @@
 }
 
 base::FilePath BlockFiles::Name(int index) {
   // The file format allows for 256 files.
   DCHECK(index < 256 && index >= 0);
   std::string tmp = base::StringPrintf("%s%d", kBlockName, index);
   return path_.AppendASCII(tmp);
 }
 
 }  // namespace disk_cache