Launch Google Update on uninstall.

chrome/installer/util/google_update_settings.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/installer/util/google_update_settings.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/path_service.h"
@@ skipping 513 matching lines @@
       GetUpdatePolicyFromDword(value, &update_policy);
     }
   }
 #endif  // defined(GOOGLE_CHROME_BUILD)
 
   if (is_overridden != NULL)
     *is_overridden = found_override;
 
   return update_policy;
 }
+
+string16 GoogleUpdateSettings::GetUninstallCommandLine(bool system_install) {
+  const HKEY root_key = system_install ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
+  string16 cmd_line;
+  RegKey update_key;
+
+  if (update_key.Open(root_key, google_update::kRegPathGoogleUpdate,
+                      KEY_QUERY_VALUE) == ERROR_SUCCESS) {
+    update_key.ReadValue(google_update::kRegUninstallCmdLine, &cmd_line);
+  }
+
+  return cmd_line;
+}