Make ExtensionInstallPrompt::Prompt ref-counted

chrome/browser/ui/cocoa/extensions/extension_install_prompt_test_utils.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_EXTENSIONS_EXTENSION_INSTALL_PROMPT_TEST_UTILS_H_
 #define CHROME_BROWSER_UI_COCOA_EXTENSIONS_EXTENSION_INSTALL_PROMPT_TEST_UTILS_H_
 
+#include "base/memory/ref_counted.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 
 namespace chrome {
 
 // A simple delegate implementation that counts the number of times
 // |InstallUIProceed| and |InstallUIAbort| are called.
 class MockExtensionInstallPromptDelegate
     : public ExtensionInstallPrompt::Delegate {
  public:
   MockExtensionInstallPromptDelegate()
@@ skipping 17 matching lines @@
     const char* extension_dir_name,
     const char* manifest_file);
 
 // Loads the default install_prompt test extension.
 scoped_refptr<extensions::Extension> LoadInstallPromptExtension();
 
 // Loads the icon for the install prompt extension.
 gfx::Image LoadInstallPromptIcon();
 
 // Builds a prompt using the given extension.
-ExtensionInstallPrompt::Prompt BuildExtensionInstallPrompt(
+scoped_refptr<ExtensionInstallPrompt::Prompt> BuildExtensionInstallPrompt(
     extensions::Extension* extension);
 
-ExtensionInstallPrompt::Prompt BuildExtensionPostInstallPermissionsPrompt(
-    extensions::Extension* extension);
+scoped_refptr<ExtensionInstallPrompt::Prompt>
+    BuildExtensionPostInstallPermissionsPrompt(
+        extensions::Extension* extension);
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_COCOA_EXTENSIONS_EXTENSION_INSTALL_PROMPT_TEST_UTILS_H_