Refactoring installer shortcut deletion; adding dedicated shortcut update feature.

chrome/installer/setup/uninstall.cc

 // 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.
 //
 // This file defines the methods useful for uninstalling Chrome.
 
 #include "chrome/installer/setup/uninstall.h"
 
 #include <windows.h>
 
@@ skipping 321 matching lines @@
 void DeleteShortcuts(const InstallerState& installer_state,
                      const Product& product,
                      const base::FilePath& target_exe) {
   BrowserDistribution* dist = product.distribution();
 
   // The per-user shortcut for this user, if present on a system-level install,
   // has already been deleted in chrome_browser_main_win.cc::DoUninstallTasks().
   ShellUtil::ShellChange install_level = installer_state.system_install() ?
       ShellUtil::SYSTEM_LEVEL : ShellUtil::CURRENT_USER;
 
-  VLOG(1) << "Deleting Desktop shortcut.";
-  if (!ShellUtil::RemoveShortcut(ShellUtil::SHORTCUT_LOCATION_DESKTOP, dist,
-                                 target_exe, install_level, NULL)) {
-    LOG(WARNING) << "Failed to delete Desktop shortcut.";
-  }
-  // Also try to delete the alternate desktop shortcut. It is not sufficient
-  // to do so upon failure of the above call as ERROR_FILE_NOT_FOUND on
-  // delete is considered success.
-  if (!ShellUtil::RemoveShortcut(
-          ShellUtil::SHORTCUT_LOCATION_DESKTOP, dist, target_exe, install_level,
-          &dist->GetAlternateApplicationName())) {
-    LOG(WARNING) << "Failed to delete alternate Desktop shortcut.";
+  VLOG(1) << "Deleting Desktop shortcuts.";
+  if (!ShellUtil::RemoveShortcuts(ShellUtil::SHORTCUT_LOCATION_DESKTOP, dist,
+                                  install_level, target_exe)) {
+    LOG(WARNING) << "Failed to delete Desktop shortcuts.";
   }
 
-  VLOG(1) << "Deleting Quick Launch shortcut.";
-  if (!ShellUtil::RemoveShortcut(ShellUtil::SHORTCUT_LOCATION_QUICK_LAUNCH,
-                                 dist, target_exe, install_level, NULL)) {
-    LOG(WARNING) << "Failed to delete Quick Launch shortcut.";
+  VLOG(1) << "Deleting Quick Launch shortcuts.";
+  if (!ShellUtil::RemoveShortcuts(ShellUtil::SHORTCUT_LOCATION_QUICK_LAUNCH,
+                                  dist, install_level, target_exe)) {
+    LOG(WARNING) << "Failed to delete Quick Launch shortcuts.";
   }
 
   VLOG(1) << "Deleting Start Menu shortcuts.";
-  if (!ShellUtil::RemoveShortcut(ShellUtil::SHORTCUT_LOCATION_START_MENU, dist,
-                                 target_exe, install_level, NULL)) {
+  if (!ShellUtil::RemoveShortcuts(ShellUtil::SHORTCUT_LOCATION_START_MENU, dist,
+                                  install_level, target_exe)) {
     LOG(WARNING) << "Failed to delete Start Menu shortcuts.";
   }
 
-  // Although the shortcut removal calls above will unpin their shortcut if they
-  // result in a deletion (i.e. shortcut existed and pointed to |target_exe|),
-  // it is possible for shortcuts to remain pinned while their parent shortcut
-  // has been deleted or changed to point to another |target_exe|. Make sure all
-  // pinned-to-taskbar shortcuts that point to |target_exe| are unpinned.
-  ShellUtil::RemoveTaskbarShortcuts(target_exe.value());
+  // Perform dedicated unpinning pinned-to-taskbar shortcuts, rather than
+  // during shortcut removal above (which is unreliable since shortcuts may be
+  // retargeted at some point).

[gab, 2013/04/30 22:30:22]

"Unpin all pinned-to-taskbar shortcuts that point to |chrome_exe|."

I don't think this comment needs to be more specific than that, it implies all
pins (i.e. user-pinned or installer-pinned), plus any future reader of this code
will not know this wasn't how it used to work :).

[huangs, 2013/05/01 04:11:51]

Done.

+  if (!ShellUtil::RemoveShortcuts(ShellUtil::SHORTCUT_LOCATION_TASKBAR_PINS,
+                                  dist, ShellUtil::CURRENT_USER, target_exe)) {
+    LOG_IF(WARNING, base::win::GetVersion() >= base::win::VERSION_WIN7)
+        << "Failed to unpin taskbar shortcuts at user-level.";
+  }
 
-  ShellUtil::RemoveStartScreenShortcuts(product.distribution(),
-                                        target_exe.value());
+  // Remove all secondary tiles with target set to |target_exe| from the
+  // start screen for |dist|.

[gab, 2013/04/30 22:30:22]

This comment is wrong, the code actually deletes the entire folder
unconditionally.

[huangs, 2013/05/01 04:11:51]

Just copying the old comment for RemoveStartScreenShortcuts().  Should have been
more careful.  Rephrased, PTAL.

+  if (!ShellUtil::RemoveShortcuts(ShellUtil::SHORTCUT_LOCATION_APP_SHORTCUTS,
+                                  dist, install_level, target_exe)) {
+    LOG_IF(WARNING, base::win::GetVersion() >= base::win::VERSION_WIN8)
+        << "Failed to delete start-screen shortcuts.";
+  }
 }
 
 bool ScheduleParentAndGrandparentForDeletion(const base::FilePath& path) {
   base::FilePath parent_dir = path.DirName();
   bool ret = ScheduleFileSystemEntityForDeletion(parent_dir.value().c_str());
   if (!ret) {
     LOG(ERROR) << "Failed to schedule parent dir for deletion: "
                << parent_dir.value();
   } else {
     base::FilePath grandparent_dir(parent_dir.DirName());
@@ skipping 1027 matching lines @@
     // deletion unconditionally. If they are not empty, the session manager
     // will not delete them on reboot.
     ScheduleParentAndGrandparentForDeletion(target_path);
   } else if (DeleteApplicationProductAndVendorDirectories(target_path) ==
              installer::DELETE_FAILED) {
     *uninstall_status = installer::UNINSTALL_FAILED;
   }
 }
 
 }  // namespace installer