Use of base::StringPairs appropriately in simple_backend_impl

net/disk_cache/simple/simple_backend_impl.h

 // Copyright (c) 2013 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.
 
 #ifndef NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_
 #define NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_
 
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
 #include "base/containers/hash_tables.h"
 #include "base/files/file_path.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "base/strings/string_split.h"
 #include "base/task_runner.h"
 #include "base/time/time.h"
 #include "net/base/cache_type.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/disk_cache/simple/simple_entry_impl.h"
 #include "net/disk_cache/simple/simple_index_delegate.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 class TaskRunner;
@@ skipping 69 matching lines @@
                   const CompletionCallback& callback) override;
   int DoomEntry(const std::string& key,
                 const CompletionCallback& callback) override;
   int DoomAllEntries(const CompletionCallback& callback) override;
   int DoomEntriesBetween(base::Time initial_time,
                          base::Time end_time,
                          const CompletionCallback& callback) override;
   int DoomEntriesSince(base::Time initial_time,
                        const CompletionCallback& callback) override;
   scoped_ptr<Iterator> CreateIterator() override;
-  void GetStats(
-      std::vector<std::pair<std::string, std::string>>* stats) override;
+  void GetStats(base::StringPairs* stats) override;
   void OnExternalCacheHit(const std::string& key) override;
 
  private:
   class SimpleIterator;
   friend class SimpleIterator;
 
   typedef base::hash_map<uint64, SimpleEntryImpl*> EntryMap;
 
   typedef base::Callback<void(base::Time mtime, uint64 max_size, int result)>
       InitializeIndexCallback;
@@ skipping 83 matching lines @@
   // is complete. The base::Closure map target is used to store deferred
   // operations to be run at the completion of the Doom.
   base::hash_map<uint64, std::vector<base::Closure> > entries_pending_doom_;
 
   net::NetLog* const net_log_;
 };
 
 }  // namespace disk_cache
 
 #endif  // NET_DISK_CACHE_SIMPLE_SIMPLE_BACKEND_IMPL_H_