Use title on Mac file select dialog.

ui/shell_dialogs/select_file_dialog_mac.mm

 // 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.
 
 #include "ui/shell_dialogs/select_file_dialog.h"
 
 #import <Cocoa/Cocoa.h>
 #include <CoreServices/CoreServices.h>
 
 #include <map>
@@ skipping 175 matching lines @@
 
   // Note: we need to retain the dialog as owning_window can be null.
   // (See http://crbug.com/29213 .)
   NSSavePanel* dialog;
   if (type == SELECT_SAVEAS_FILE)
     dialog = [[NSSavePanel savePanel] retain];
   else
     dialog = [[NSOpenPanel openPanel] retain];
 
   if (!title.empty())
-    [dialog setTitle:base::SysUTF16ToNSString(title)];
+    [dialog setMessage:base::SysUTF16ToNSString(title)];
 
   NSString* default_dir = nil;
   NSString* default_filename = nil;
   if (!default_path.empty()) {
     // The file dialog is going to do a ton of stats anyway. Not much
     // point in eliminating this one.
     base::ThreadRestrictions::ScopedAllowIO allow_io;
     if (base::DirectoryExists(default_path)) {
       default_dir = base::SysUTF8ToNSString(default_path.value());
     } else {
@@ skipping 213 matching lines @@
 
 namespace ui {
 
 SelectFileDialog* CreateMacSelectFileDialog(
     SelectFileDialog::Listener* listener,
     SelectFilePolicy* policy) {
   return new SelectFileDialogImpl(listener, policy);
 }
 
 }  // namespace ui