Convert //sql to use std::unique_ptr

sql/connection.h

Index: sql/connection.h
diff --git a/sql/connection.h b/sql/connection.h
index 4606a1f357c3ae00c0aee789af5dc91487294d99..cebf93b1300c3cbd13ae5a6ac9d92aa3a6c4d6e5 100644
--- a/sql/connection.h
+++ b/sql/connection.h
@@ -8,6 +8,7 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <map>
+#include <memory>
 #include <set>
 #include <string>
 #include <vector>
@@ -17,7 +18,6 @@
 #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"
@@ -792,10 +792,10 @@ class SQL_EXPORT Connection {
 
   // 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);
 };