Update OS X to use scoped_refptr<T>::get() rather than implicit "operator T*"

chrome/browser/ui/cocoa/extensions/extension_installed_bubble_controller_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 <Cocoa/Cocoa.h>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 93 matching lines @@
     } else if (type == extension_installed_bubble::kApp) {
       extension_input_value.SetString(keys::kName, "test app");
       extension_input_value.SetString(keys::kLaunchWebURL,
                                       "http://www.example.com");
     }
 
     std::string error;
     scoped_refptr<Extension> extension =
         Extension::Create(path, extensions::Manifest::INVALID_LOCATION,
                           extension_input_value, Extension::NO_FLAGS, &error);
-    extension_service_->AddExtension(extension);
+    extension_service_->AddExtension(extension.get());
     return extension;
   }
 
   // Required to initialize the extension installed bubble.
   NSWindow* window_;  // weak, owned by CocoaProfileTest.
 
   ExtensionService* extension_service_;
 
   // Skeleton extension to be tested; reinitialized for each test.
   scoped_refptr<Extension> extension_;
@@ skipping 178 matching lines @@
   int minHeight = extension_installed_bubble::kIconSize +
     (2 * extension_installed_bubble::kOuterVerticalMargin);
   EXPECT_GT(height, minHeight);
 
   // Make sure the "show me" link is visible.
   EXPECT_FALSE([[controller appInstalledShortcutLink] isHidden]);
 
   [controller close];
 }