Convert //sql to use std::unique_ptr

sql/connection.h

 // 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.
 
 #ifndef SQL_CONNECTION_H_
 #define SQL_CONNECTION_H_
 
 #include <stddef.h>
 #include <stdint.h>
 #include <map>
+#include <memory>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
 #include "sql/sql_export.h"
 
 struct sqlite3;
 struct sqlite3_stmt;
 
 namespace base {
 class FilePath;
 class HistogramBase;
@@ skipping 754 matching lines @@
 
   // Histogram for tracking time taken in updates (including commit and
   // autocommit).
   base::HistogramBase* update_time_histogram_;
 
   // Histogram for tracking time taken in all queries.
   base::HistogramBase* query_time_histogram_;
 
   // Source for timing information, provided to allow tests to inject time
   // changes.
-  scoped_ptr<TimeSource> clock_;
+  std::unique_ptr<TimeSource> clock_;
 
   // Stores the dump provider object when db is open.
-  scoped_ptr<ConnectionMemoryDumpProvider> memory_dump_provider_;
+  std::unique_ptr<ConnectionMemoryDumpProvider> memory_dump_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(Connection);
 };
 
 }  // namespace sql
 
 #endif  // SQL_CONNECTION_H_