Allow extension overinstall

chrome/browser/extensions/crx_installer.h

 // Copyright (c) 2009 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 "base/file_path.h"
@@ skipping 95 matching lines @@
   // it is OK to install this extension.
   void ConfirmInstall();
 
   // Runs on File thread. Install the unpacked extension into the profile and
   // notify the frontend.
   void CompleteInstall();
 
   // Result reporting.
   void ReportFailureFromFileThread(const std::string& error);
   void ReportFailureFromUIThread(const std::string& error);
-  void ReportOverinstallFromFileThread();
-  void ReportOverinstallFromUIThread();
   void ReportSuccessFromFileThread();
   void ReportSuccessFromUIThread();
 
   // The file we're installing.
   FilePath source_file_;
 
   // The URL the file was downloaded from.
   GURL original_url_;
 
   // The directory extensions are installed to.
@@ skipping 59 matching lines @@
   ExtensionInstallUI* client_;
 
   // The root of the unpacked extension directory. This is a subdirectory of
   // temp_dir_, so we don't have to delete it explicitly.
   FilePath unpacked_extension_root_;
 
   DISALLOW_COPY_AND_ASSIGN(CrxInstaller);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_CRX_INSTALLER_H_