Fix permission regression where warnings aren't shown in the dialog

chrome/browser/extensions/extension_install_prompt.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_EXTENSION_INSTALL_PROMPT_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_PROMPT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 344 matching lines @@
       const extensions::Extension* extension,
       const std::vector<base::FilePath>& retained_file_paths);
 
   // Installation was successful. This is declared virtual for testing.
   virtual void OnInstallSuccess(const extensions::Extension* extension,
                                 SkBitmap* icon);
 
   // Installation failed. This is declared virtual for testing.
   virtual void OnInstallFailure(const extensions::CrxInstallerError& error);
 
+  void set_callback_for_test(const ShowDialogCallback& show_dialog_callback) {
+    show_dialog_callback_ = show_dialog_callback;
+  }
+
  protected:
   friend class extensions::ExtensionWebstorePrivateApiTest;
   friend class WebstoreStartupInstallUnpackFailureTest;
 
   // Whether or not we should record the oauth2 grant upon successful install.
   bool record_oauth2_grant_;
 
  private:
   friend class GalleryInstallApiTestObserver;
 
@@ skipping 37 matching lines @@
   Delegate* delegate_;
 
   // A pre-filled prompt.
   scoped_refptr<Prompt> prompt_;
 
   // Used to show the confirm dialog.
   ShowDialogCallback show_dialog_callback_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_PROMPT_H_