Fix Mac compile.

chrome/browser/ui/cocoa/tabpose_window_unittest.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.
 
 #import "chrome/browser/ui/cocoa/tabpose_window.h"
 
 #include "base/mac/mac_util.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/cocoa/cocoa_profile_test.h"
@@ skipping 20 matching lines @@
     browser()->tab_strip_model()->AppendTabContents(
         tab_contents, /*foreground=*/true);
   }
 
   scoped_refptr<SiteInstance> site_instance_;
 };
 
 TEST_F(TabposeWindowTest, TestShow) {
   // Skip this test on 10.7
   // http://code.google.com/p/chromium/issues/detail?id=127845
-  if (IsOSLionOrLater()) {
+  if (base::mac::IsOSLionOrLater()) {
     return;
   }
 
   NSWindow* parent = browser()->window()->GetNativeWindow();
 
   [parent orderFront:nil];
   EXPECT_TRUE([parent isVisible]);
 
   // Add a few tabs to the tab strip model.
   for (int i = 0; i < 3; ++i)
@@ skipping 60 matching lines @@
   DCHECK_EQ([window selectedIndex], 0);
 
   [window selectTileAtIndexWithoutAnimation:1];
   model->CloseTabContentsAt(0, TabStripModel::CLOSE_NONE);
   DCHECK_EQ([window thumbnailLayerCount], 1u);
   DCHECK_EQ([window selectedIndex], 0);
 
   // Should release the window.
   [window mouseDown:nil];
 }