win: string_util.h -> utf_string_conversions.h fix.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/830002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@41292 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/app/sql/connection.cc b/app/sql/connection.cc
index 8f74e6e..81f3d36 100644
--- a/app/sql/connection.cc
+++ b/app/sql/connection.cc
@@ -10,6 +10,7 @@
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/string_util.h"
+#include "base/utf_string_conversions.h"
 #include "third_party/sqlite/preprocessed/sqlite3.h"
 
 namespace sql {