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

chrome/browser/ui/cocoa/extensions/windowed_install_dialog_controller_browsertest.mm

 // Copyright 2013 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/extensions/windowed_install_dialog_controller.h"
 
+#include <utility>
+
 #include "base/run_loop.h"
 #include "base/threading/sequenced_worker_pool.h"
+#include "chrome/browser/extensions/extension_install_prompt_test_helper.h"
 #include "chrome/browser/ui/browser.h"
 #import "chrome/browser/ui/cocoa/extensions/extension_install_prompt_test_utils.h"
 #import "chrome/browser/ui/cocoa/extensions/extension_install_view_controller.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_utils.h"
 #include "extensions/common/extension.h"
 
 namespace {
 
 // Similar to ShowExtensionInstallDialogImpl except this allows the created
 // dialog controller to be captured and manipulated for tests.
 void TestingShowAppListInstallDialogController(
     WindowedInstallDialogController** controller,
     ExtensionInstallPromptShowParams* show_params,
-    ExtensionInstallPrompt::Delegate* delegate,
+    const ExtensionInstallPrompt::DoneCallback& done_callback,
     scoped_ptr<ExtensionInstallPrompt::Prompt> prompt) {
   *controller =
-      new WindowedInstallDialogController(show_params, delegate, prompt.Pass());
+      new WindowedInstallDialogController(show_params, done_callback,
+                                          std::move(prompt));
 }
 
 typedef InProcessBrowserTest WindowedInstallDialogControllerBrowserTest;
 
 }  // namespace
 
 // Test for showing an extension install prompt with no parent WebContents.
 IN_PROC_BROWSER_TEST_F(WindowedInstallDialogControllerBrowserTest,
                        ShowInstallDialog) {
   // Construct a prompt with a NULL parent window, the way ExtensionEnableFlow
   // will for the Mac app list. For testing, sets a NULL PageNavigator as well.
   scoped_ptr<ExtensionInstallPrompt> prompt(
       new ExtensionInstallPrompt(browser()->profile(), NULL));
 
   WindowedInstallDialogController* controller = NULL;
-  chrome::MockExtensionInstallPromptDelegate delegate;
+  ExtensionInstallPromptTestHelper test_helper;
   scoped_refptr<extensions::Extension> extension =
       chrome::LoadInstallPromptExtension("permissions", "many-apis.json");
   prompt->ShowDialog(
-      &delegate, extension.get(), nullptr,
+      test_helper.GetCallback(), extension.get(), nullptr,
       base::Bind(&TestingShowAppListInstallDialogController, &controller));
 
   // The prompt needs to load the image, which happens on the blocking pool.
   content::RunAllBlockingPoolTasksUntilIdle();
   ASSERT_TRUE(controller);
 
   base::scoped_nsobject<NSWindow> window(
       [[[controller->GetViewController() view] window] retain]);
   EXPECT_TRUE([window isVisible]);
   EXPECT_TRUE([window delegate]);
-  EXPECT_EQ(0, delegate.abort_count());
+  EXPECT_FALSE(test_helper.has_result());
 
   // Press cancel to close the window.
   [[controller->GetViewController() cancelButton] performClick:nil];
   EXPECT_FALSE([window delegate]);
-  EXPECT_EQ(1, delegate.abort_count());
+  EXPECT_EQ(ExtensionInstallPrompt::Result::USER_CANCELED,
+            test_helper.result());
 
   // Ensure the window is closed.
   EXPECT_FALSE([window isVisible]);
 }