Fix Snow Leopard SDK errors

chrome/browser/cocoa/autocomplete_text_field_unittest.mm

 // Copyright (c) 2009 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/scoped_nsobject.h"
 #import "chrome/browser/cocoa/autocomplete_text_field.h"
 #import "chrome/browser/cocoa/autocomplete_text_field_cell.h"
 #import "chrome/browser/cocoa/autocomplete_text_field_editor.h"
@@ skipping 28 matching lines @@
   AutocompleteTextFieldTest() {
     // Make sure this is wide enough to play games with the cell
     // decorations.
     NSRect frame = NSMakeRect(0, 0, 300, 30);
     field_.reset([[AutocompleteTextField alloc] initWithFrame:frame]);
     [field_ setStringValue:@"Testing"];
     [cocoa_helper_.contentView() addSubview:field_.get()];
 
     window_delegate_.reset(
         [[AutocompleteTextFieldWindowTestDelegate alloc] init]);
-    [cocoa_helper_.window() setDelegate:window_delegate_];
+    [cocoa_helper_.window() setDelegate:window_delegate_.get()];
   }
 
   // The removeFromSuperview call is needed to prevent crashes in later tests.
   ~AutocompleteTextFieldTest() {
     [cocoa_helper_.window() setDelegate:nil];
     [field_ removeFromSuperview];
   }
 
   CocoaTestHelper cocoa_helper_;  // Inits Cocoa, creates window, etc...
   scoped_nsobject<AutocompleteTextField> field_;
@@ skipping 297 matching lines @@
   }
   EXPECT_TRUE(editor_ != nil);
 
   // This needs to be called every time, otherwise notifications
   // aren't sent correctly.
   [editor_ setFieldEditor:YES];
   return editor_;
 }
 
 @end