ui/shell_dialogs: Use base::string16 now that string16 was moved into base namespace.

ui/shell_dialogs/gtk/select_file_dialog_impl_kde.cc

Index: ui/shell_dialogs/gtk/select_file_dialog_impl_kde.cc
diff --git a/ui/shell_dialogs/gtk/select_file_dialog_impl_kde.cc b/ui/shell_dialogs/gtk/select_file_dialog_impl_kde.cc
index 3ac92ec211959109d8b9b289b5b93671556356bd..fee880879db3b804679fb1e62da263fa13cdcc28 100644
--- a/ui/shell_dialogs/gtk/select_file_dialog_impl_kde.cc
+++ b/ui/shell_dialogs/gtk/select_file_dialog_impl_kde.cc
@@ -49,7 +49,7 @@ class SelectFileDialogImplKDE : public ui::SelectFileDialogImpl {
   // |params| is user data we pass back via the Listener interface.
   virtual void SelectFileImpl(
       Type type,
-      const string16& title,
+      const base::string16& title,
       const base::FilePath& default_path,
       const FileTypeInfo* file_types,
       int file_type_index,
@@ -170,7 +170,7 @@ SelectFileDialogImplKDE::~SelectFileDialogImplKDE() {
 // We ignore |default_extension|.
 void SelectFileDialogImplKDE::SelectFileImpl(
     Type type,
-    const string16& title,
+    const base::string16& title,
     const base::FilePath& default_path,
     const FileTypeInfo* file_types,
     int file_type_index,