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

chrome/browser/ui/extensions/extension_enable_flow.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_EXTENSIONS_EXTENSION_ENABLE_FLOW_H_
 #define CHROME_BROWSER_UI_EXTENSIONS_EXTENSION_ENABLE_FLOW_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "base/scoped_observer.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/extension_registry_observer.h"
 
 class ExtensionEnableFlowDelegate;
 
 namespace content {
 class WebContents;
 }
 
 namespace extensions {
 class ExtensionRegistry;
 }
 
 // ExtensionEnableFlow performs an UI flow to enable a disabled/terminated
 // extension. It calls its delegate when enabling is done or is aborted.
 // Callback on the delegate might be called synchronously if there is no
 // permission change while the extension is disabled/terminated (or the
 // extension is enabled already). Otherwise, a re-enable install prompt is
 // shown to user. The extension is enabled when user acknowledges it or the
 // flow is aborted when user declines it.
-class ExtensionEnableFlow : public ExtensionInstallPrompt::Delegate,
-                            public content::NotificationObserver,
+class ExtensionEnableFlow : public content::NotificationObserver,
                             public extensions::ExtensionRegistryObserver {
  public:
   ExtensionEnableFlow(Profile* profile,
                       const std::string& extension_id,
                       ExtensionEnableFlowDelegate* delegate);
   ~ExtensionEnableFlow() override;
 
   // Starts the flow and the logic continues on |delegate_| after enabling is
   // finished or aborted. Note that |delegate_| could be called synchronously
   // before this call returns when there is no need to show UI to finish the
@@ skipping 33 matching lines @@
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
   // extensions::ExtensionRegistryObserver overrides:
   void OnExtensionLoaded(content::BrowserContext* browser_context,
                          const extensions::Extension* extension) override;
   void OnExtensionUninstalled(content::BrowserContext* browser_context,
                               const extensions::Extension* extension,
                               extensions::UninstallReason reason) override;
 
-  // ExtensionInstallPrompt::Delegate overrides:
-  void InstallUIProceed() override;
-  void InstallUIAbort(bool user_initiated) override;
+  void InstallPromptDone(ExtensionInstallPrompt::Result result);
 
   Profile* const profile_;
   const std::string extension_id_;
   ExtensionEnableFlowDelegate* const delegate_;  // Not owned.
 
   // Parent web contents for ExtensionInstallPrompt that may be created during
   // the flow. Note this is mutually exclusive with |parent_window_| below.
   content::WebContents* parent_contents_;
 
   // Parent native window for ExtensionInstallPrompt. Note this is mutually
   // exclusive with |parent_contents_| above.
   gfx::NativeWindow parent_window_;
 
   // Called to acquire a parent window for the prompt. This is used for clients
   // who only want to create a window if it is required.
   base::Callback<gfx::NativeWindow(void)> window_getter_;
 
   scoped_ptr<ExtensionInstallPrompt> prompt_;
   content::NotificationRegistrar registrar_;
 
   // Listen to extension load notification.
   ScopedObserver<extensions::ExtensionRegistry,
                  extensions::ExtensionRegistryObserver>
       extension_registry_observer_;
 
+  base::WeakPtrFactory<ExtensionEnableFlow> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionEnableFlow);
 };
 
 #endif  // CHROME_BROWSER_UI_EXTENSIONS_EXTENSION_ENABLE_FLOW_H_