ProfileShortcutManagerWin: Don't create user level shortcut when system level one exists.

chrome/installer/util/shell_util.h

 // 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 declares methods that are useful for integrating Chrome in
 // Windows shell. These methods are all static and currently part of
 // ShellUtil class.
 
 #ifndef CHROME_INSTALLER_UTIL_SHELL_UTIL_H_
 #define CHROME_INSTALLER_UTIL_SHELL_UTIL_H_
@@ skipping 31 matching lines @@
   // Typical shortcut directories. Resolved in GetShortcutPath().
   enum ShortcutLocation {
     SHORTCUT_LOCATION_DESKTOP,
     SHORTCUT_LOCATION_QUICK_LAUNCH,
     SHORTCUT_LOCATION_START_MENU,
   };
 
   enum ShortcutOperation {
     // Create a new shortcut (overwriting if necessary).
     SHELL_SHORTCUT_CREATE_ALWAYS,
-    // Create the per-user shortcut only if its system-level equivalent is not
-    // present.
+    // Create the per-user shortcut only if its system-level equivalent (with
+    // the same name) is not present.
     SHELL_SHORTCUT_CREATE_IF_NO_SYSTEM_LEVEL,
     // Overwrite an existing shortcut (fail if the shortcut doesn't exist).
     // If the arguments are not specified on the new shortcut, keep the old
     // shortcut's arguments.
     SHELL_SHORTCUT_REPLACE_EXISTING,
     // Update specified properties only on an existing shortcut.
     SHELL_SHORTCUT_UPDATE_EXISTING,
   };
 
   // Properties for shortcuts. Properties set will be applied to
@@ skipping 491 matching lines @@
   // required by the base32 standard for inputs that aren't a multiple of 5
   // bytes.
   static string16 ByteArrayToBase32(const uint8* bytes, size_t size);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ShellUtil);
 };
 
 
 #endif  // CHROME_INSTALLER_UTIL_SHELL_UTIL_H_