IndexedDB: Sprinkle DISALLOW_COPY_AND_ASSIGN where appropriate

content/browser/indexed_db/leveldb/leveldb_database.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 CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_DATABASE_H_
 #define CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_DATABASE_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
@@ skipping 21 matching lines @@
 class LevelDBSnapshot {
  private:
   friend class LevelDBDatabase;
   friend class LevelDBTransaction;
 
   explicit LevelDBSnapshot(LevelDBDatabase* db);
   ~LevelDBSnapshot();
 
   leveldb::DB* db_;
   const leveldb::Snapshot* snapshot_;
+
+  DISALLOW_COPY_AND_ASSIGN(LevelDBSnapshot);
 };
 
 class CONTENT_EXPORT LevelDBLock {
-public:
+ public:
+  LevelDBLock() {}
   virtual ~LevelDBLock() {}
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(LevelDBLock);
 };
 
 class CONTENT_EXPORT LevelDBDatabase {
  public:
   class ComparatorAdapter : public leveldb::Comparator {
    public:
     explicit ComparatorAdapter(const LevelDBComparator* comparator);
 
     virtual int Compare(const leveldb::Slice& a,
                         const leveldb::Slice& b) const OVERRIDE;
@@ skipping 40 matching lines @@
 
   scoped_ptr<leveldb::Env> env_;
   scoped_ptr<leveldb::Comparator> comparator_adapter_;
   scoped_ptr<leveldb::DB> db_;
   const LevelDBComparator* comparator_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_DATABASE_H_