Fix spurious profile shortcuts created with a system-level install.

chrome/browser/profiles/profile_shortcut_manager_win.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.
 
 #include "chrome/browser/profiles/profile_shortcut_manager_win.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 632 matching lines @@
     NonProfileShortcutAction action) {
   ProfileInfoCache* cache = &profile_manager_->GetProfileInfoCache();
   size_t profile_index = cache->GetIndexOfProfileWithPath(profile_path);
   if (profile_index == std::string::npos)
     return;
   bool remove_badging = cache->GetNumberOfProfiles() == 1;
 
   string16 old_shortcut_appended_name =
       cache->GetShortcutNameOfProfileAtIndex(profile_index);
 
+  // Exit early if the mode is to update existing profile shortcuts only and
+  // none were ever created for this profile, per the shortcut name not being
+  // set in the profile info cache.
+  if (old_shortcut_appended_name.empty() &&
+      create_mode == UPDATE_EXISTING_ONLY &&
+      action == IGNORE_NON_PROFILE_SHORTCUTS) {
+    return;
+  }
+
   string16 new_shortcut_appended_name;
   if (!remove_badging)
     new_shortcut_appended_name = cache->GetNameOfProfileAtIndex(profile_index);
 
   SkBitmap avatar_bitmap_copy_1x;
   SkBitmap avatar_bitmap_copy_2x;
   if (!remove_badging) {
     const size_t icon_index =
         cache->GetAvatarIconIndexOfProfileAtIndex(profile_index);
     const int resource_id_1x =
         cache->GetDefaultAvatarIconResourceIDAtIndex(icon_index);
     const int resource_id_2x = kProfileAvatarIconResources2x[icon_index];
     // Make a copy of the SkBitmaps to ensure that we can safely use the image
     // data on the FILE thread.
     avatar_bitmap_copy_1x = GetImageResourceSkBitmapCopy(resource_id_1x);
     avatar_bitmap_copy_2x = GetImageResourceSkBitmapCopy(resource_id_2x);
   }
   BrowserThread::PostTask(
       BrowserThread::FILE, FROM_HERE,
       base::Bind(&CreateOrUpdateDesktopShortcutsForProfile, profile_path,
                  old_shortcut_appended_name, new_shortcut_appended_name,
                  avatar_bitmap_copy_1x, avatar_bitmap_copy_2x, create_mode,
                  action));
 
   cache->SetShortcutNameOfProfileAtIndex(profile_index,
                                          new_shortcut_appended_name);
 }