Cleanup Chrome's LevelDB env to conform to C++ style guidelines.

third_party/leveldatabase/env_chromium_stdio.h

 // Copyright (c) 2013 The LevelDB Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file. See the AUTHORS file for names of contributors.
 
 #ifndef THIRD_PARTY_LEVELDATABASE_ENV_CHROMIUM_STDIO_H_
 #define THIRD_PARTY_LEVELDATABASE_ENV_CHROMIUM_STDIO_H_
 
-#include "env_chromium.h"
+#include <string>
+#include <vector>
+
+#include "third_party/leveldatabase/env_chromium.h"
 
 namespace leveldb_env {
 
 class ChromiumWritableFile : public leveldb::WritableFile {
  public:
   ChromiumWritableFile(const std::string& fname,
                        FILE* f,
                        const UMALogger* uma_logger,
                        WriteTracker* tracker,
                        bool make_backup);
@@ skipping 44 matching lines @@
   // BGThread() is the body of the background thread
   void BGThread();
   static void BGThreadWrapper(void* arg) {
     reinterpret_cast<ChromiumEnvStdio*>(arg)->BGThread();
   }
   void RecordOpenFilesLimit(const std::string& type);
 };
 
 }  // namespace leveldb_env
 
-#endif
+#endif  // THIRD_PARTY_LEVELDATABASE_ENV_CHROMIUM_STDIO_H_