Refactoring installer shortcut deletion; adding dedicated shortcut update feature.

chrome/browser/chrome_browser_main_win.cc

Index: chrome/browser/chrome_browser_main_win.cc
diff --git a/chrome/browser/chrome_browser_main_win.cc b/chrome/browser/chrome_browser_main_win.cc
index e8cd5933c25a34dddd77357d4cf58d020d78555a..d5e09d82b614067dd3ba9b5c7d8b3cfdfeb98c86 100644
--- a/chrome/browser/chrome_browser_main_win.cc
+++ b/chrome/browser/chrome_browser_main_win.cc
@@ -145,8 +145,7 @@ int DoUninstallTasks(bool chrome_still_running) {
       BrowserDistribution* dist = BrowserDistribution::GetDistribution();
       for (size_t i = 0; i < arraysize(user_shortcut_locations); ++i) {
         if (!ShellUtil::RemoveShortcut(user_shortcut_locations[i], dist,
-                                       chrome_exe, ShellUtil::CURRENT_USER,
-                                       NULL)) {
+                ShellUtil::CURRENT_USER, chrome_exe)) {
           VLOG(1) << "Failed to delete shortcut at location "
                   << user_shortcut_locations[i];
         }