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

chrome/browser/extensions/crx_installer.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_EXTENSIONS_CRX_INSTALLER_H_
 #define CHROME_BROWSER_EXTENSIONS_CRX_INSTALLER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 49 matching lines @@
 //
 // scoped_refptr<CrxInstaller> installer(new CrxInstaller(...));
 // installer->set_foo();
 // installer->set_bar();
 // installer->InstallCrx(...);
 //
 // Installation is aborted if the extension service learns that Chrome is
 // terminating during the install. We can't listen for the app termination
 // notification here in this class because it can be destroyed on any thread
 // and won't safely be able to clean up UI thread notification listeners.
-class CrxInstaller
-    : public SandboxedUnpackerClient,
-      public ExtensionInstallPrompt::Delegate {
+class CrxInstaller : public SandboxedUnpackerClient {
  public:
   // Used in histograms; do not change order.
   enum OffStoreInstallAllowReason {
     OffStoreInstallDisallowed,
     OffStoreInstallAllowedFromSettingsPage,
     OffStoreInstallAllowedBecausePref,
     OffStoreInstallAllowedInTest,
     NumOffStoreInstallAllowReasons
   };
 
@@ skipping 18 matching lines @@
   void InstallCrx(const base::FilePath& source_file);
   void InstallCrxFile(const CRXFileInfo& source_file);
 
   // Convert the specified user script into an extension and install it.
   void InstallUserScript(const base::FilePath& source_file,
                          const GURL& download_url);
 
   // Convert the specified web app into an extension and install it.
   void InstallWebApp(const WebApplicationInfo& web_app);
 
-  // Overridden from ExtensionInstallPrompt::Delegate:
-  void InstallUIProceed() override;
-  void InstallUIAbort(bool user_initiated) override;
+  void OnInstallPromptDone(ExtensionInstallPrompt::Result result);
 
   int creation_flags() const { return creation_flags_; }
   void set_creation_flags(int val) { creation_flags_ = val; }
 
   const base::FilePath& source_file() const { return source_file_; }
 
   Manifest::Location install_source() const {
     return install_source_;
   }
   void set_install_source(Manifest::Location source) {
@@ skipping 316 matching lines @@
 
   // Performs requirements, policy and blacklist checks on the extension.
   ExtensionInstallChecker install_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(CrxInstaller);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_CRX_INSTALLER_H_