Add WOW64 support to the installer registry work items

chrome/installer/util/delete_reg_key_work_item.h

Index: chrome/installer/util/delete_reg_key_work_item.h
diff --git a/chrome/installer/util/delete_reg_key_work_item.h b/chrome/installer/util/delete_reg_key_work_item.h
index 4b92b9485acff7aef0f07ac37bcf23a2bcc0e59d..51c19f26ac58a0d8cbc7c9f82bb0ba3ef68095f5 100644
--- a/chrome/installer/util/delete_reg_key_work_item.h
+++ b/chrome/installer/util/delete_reg_key_work_item.h
@@ -30,7 +30,9 @@ class DeleteRegKeyWorkItem : public WorkItem {
  private:
   friend class WorkItem;
 
-  DeleteRegKeyWorkItem(HKEY predefined_root, const std::wstring& path);
+  DeleteRegKeyWorkItem(HKEY predefined_root,
+                       const std::wstring& path,
+                       REGSAM wow64_access);
 
   // Root key from which we delete the key. The root key can only be
   // one of the predefined keys on Windows.
@@ -39,6 +41,9 @@ class DeleteRegKeyWorkItem : public WorkItem {
   // Path of the key to be deleted.
   std::wstring path_;
 
+  // Whether to force 32-bit or 64-bit view of the target key.
+  REGSAM wow64_access_;
+
   // Backup of the deleted key.
   RegistryKeyBackup backup_;