[Extensions] Migrate ExtensionInstallPrompt::Delegate to be a callback

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()
-      : proceed_count_(0),
-        abort_count_(0) {}
-
-  // ExtensionInstallPrompt::Delegate overrides.
-  void InstallUIProceed() override;
-  void InstallUIAbort(bool user_initiated) override;
-
-  int proceed_count() { return proceed_count_; }
-  int abort_count() { return abort_count_; }
-
- protected:
-  int proceed_count_;
-  int abort_count_;
-};
-
 // Loads the test extension from the given test directory and manifest file.
 scoped_refptr<extensions::Extension> LoadInstallPromptExtension(
     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.
 scoped_ptr<ExtensionInstallPrompt::Prompt> BuildExtensionInstallPrompt(
     extensions::Extension* extension);
 
 scoped_ptr<ExtensionInstallPrompt::Prompt>
 BuildExtensionPostInstallPermissionsPrompt(extensions::Extension* extension);
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_UI_COCOA_EXTENSIONS_EXTENSION_INSTALL_PROMPT_TEST_UTILS_H_