Don't register or use the DelegateExecute verb handler if it isn't present.

chrome/installer/setup/uninstall.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.
 //
 // This file defines the methods useful for uninstalling Chrome.
 
 #include "chrome/installer/setup/uninstall.h"
 
 #include <vector>
 
@@ skipping 683 matching lines @@
     ext_association.append(L"\\");
     ext_association.append(chrome::kExtensionFileExtension);
     InstallUtil::DeleteRegistryKey(roots[i], ext_association);
   }
 }
 
 // Builds and executes a work item list to remove DelegateExecute verb handler
 // work items for |product|.  This will be a noop for products whose
 // corresponding BrowserDistribution implementations do not publish
 // DelegateExecute data via an implementation of GetDelegateExecuteHandlerData.
-bool ProcessDelegateExecuteWorkItems(const InstallationState& original_state,
-                                     const InstallerState& installer_state,
-                                     const FilePath& setup_path,
+bool ProcessDelegateExecuteWorkItems(const InstallerState& installer_state,
                                      const Product& product) {
   scoped_ptr<WorkItemList> item_list(WorkItem::CreateNoRollbackWorkItemList());
-  AddDelegateExecuteWorkItems(original_state, installer_state, setup_path,
-                              Version(), product, item_list.get());
+  AddDelegateExecuteWorkItems(installer_state, FilePath(), Version(), product,
+                              item_list.get());
   return item_list->Do();
 }
 
 bool ProcessChromeFrameWorkItems(const InstallationState& original_state,
                                  const InstallerState& installer_state,
                                  const FilePath& setup_path,
                                  const Product& product) {
   if (!product.is_chrome_frame())
     return false;
 
@@ skipping 102 matching lines @@
   // self-destruct following the installation of system-level Chrome (because
   // the system-level Chrome owns the HKLM registration now), and 2) this user
   // had made Chrome their default browser.
   if (installer_state.system_install() ||
       (remove_all &&
        (!suffix.empty() || CurrentUserHasDefaultBrowser(installer_state)))) {
     DeleteChromeRegistrationKeys(product.distribution(), HKEY_LOCAL_MACHINE,
                                  suffix, installer_state.target_path(), &ret);
   }
 
-  ProcessDelegateExecuteWorkItems(original_state, installer_state, setup_path,
-                                  product);
+  ProcessDelegateExecuteWorkItems(installer_state, product);
 
   if (!is_chrome) {
     ProcessChromeFrameWorkItems(original_state, installer_state, setup_path,
                                 product);
   }
 
   if (installer_state.is_multi_install())
     ProcessGoogleUpdateItems(original_state, installer_state, product);
 
   ProcessQuickEnableWorkItems(installer_state, original_state);
@@ skipping 110 matching lines @@
 
   // Try and delete the preserved local state once the post-install
   // operations are complete.
   if (!backup_state_file.empty())
     file_util::Delete(backup_state_file, false);
 
   return ret;
 }
 
 }  // namespace installer