Make default browser path check case insensitive.

chrome/installer/util/shell_util.cc

 // Copyright (c) 2006-2008 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 functions that integrate Chrome in Windows shell. These
 // functions can be used by Chrome as well as Chrome installer. All of the
 // work is done by the local functions defined in anonymous namespace in
 // this class.
 
 #include <windows.h>
@@ skipping 135 matching lines @@
     }
   }
 
   // Checks if the current registry entry exists in HKLM registry and the value
   // is same.
   bool ExistsInHKLM() {
     RegKey key(HKEY_LOCAL_MACHINE, _key_path.c_str());
     bool found = false;
     if (_is_string) {
       std::wstring read_value;
-      found = key.ReadValue(_name.c_str(), &read_value) &&
-              read_value == _value;
+      found = (key.ReadValue(_name.c_str(), &read_value)) &&
+              (read_value.size() == _value.size()) &&
+              (std::equal(_value.begin(), _value.end(), read_value.begin(),
+                          CaseInsensitiveCompare<wchar_t>()));
     } else {
       DWORD read_value;
       found = key.ReadValueDW(_name.c_str(), &read_value) &&
               read_value == _int_value;
     }
     key.Close();
     return found;
   }
 
   // Checks if the current registry entry exists in HKLM registry
@@ skipping 532 matching lines @@
   } else {
     return file_util::UpdateShortcutLink(chrome_exe.c_str(),      // target
                                          shortcut.c_str(),        // shortcut
                                          chrome_path.c_str(),     // working dir
                                          NULL,                    // arguments
                                          description.c_str(),     // description
                                          chrome_exe.c_str(),      // icon file
                                          0);                      // icon index
   }
 }