Refactor the code for loading icons into the PageInfoModel.

base/mac_util_unittest.mm

 // Copyright (c) 2010 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 <vector>
 
 #include "base/mac_util.h"
 
 #import "base/chrome_application_mac.h"
@@ skipping 162 matching lines @@
   NSRect rect = NSZeroRect;
   rect.size = [nsImage size];
   NSRectFill(rect);
   [nsImage unlockFocus];
 
   scoped_cftyperef<CGImageRef> cgImage(
       mac_util::CopyNSImageToCGImage(nsImage.get()));
   EXPECT_TRUE(cgImage.get());
 }
 
+TEST_F(MacUtilTest, NSObjectRetainRelease) {
+  scoped_nsobject<NSArray> array([[NSArray alloc] initWithObjects:@"foo", nil]);
+  EXPECT_EQ(1U, [array retainCount]);
+
+  mac_util::NSObjectRetain(array);
+  EXPECT_EQ(2U, [array retainCount]);
+
+  mac_util::NSObjectRelease(array);
+  EXPECT_EQ(1U, [array retainCount]);
+}
+
 }  // namespace
 
 }  // namespace mac_util