Issue 71980: Extensions code should use UTF-16 for user-visible Unicode strings

chrome/browser/extensions/extension_install_ui.h

 // Copyright (c) 2011 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_UI_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_UI_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 127 matching lines @@
   //
   // We *MUST* eventually call either Proceed() or Abort() on |delegate|.
   virtual void ConfirmPermissions(Delegate* delegate,
                                   const Extension* extension,
                                   const ExtensionPermissionSet* permissions);
 
   // Installation was successful. This is declared virtual for testing.
   virtual void OnInstallSuccess(const Extension* extension, SkBitmap* icon);
 
   // Installation failed. This is declared virtual for testing.
-  virtual void OnInstallFailure(const std::string& error);
+  virtual void OnInstallFailure(const string16& error);
 
   // ImageLoadingTracker::Observer:
   virtual void OnImageLoaded(
       SkBitmap* image, const ExtensionResource& resource, int index) OVERRIDE;
 
   // Opens a new tab page and animates the app icon for the app with id
   // |app_id|.
   static void OpenAppInstalledNTP(Browser* browser, const std::string& app_id);
 
  protected:
@@ skipping 59 matching lines @@
 
   // Whether to show an installed bubble on app install, or use the default
   // action of opening a new tab page.
   bool use_app_installed_bubble_;
 
   // Whether or not to show the default UI after completing the installation.
   bool skip_post_install_ui_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_UI_H_