Add WOW64 support to the installer registry work items

chrome/installer/util/create_reg_key_work_item.h

Index: chrome/installer/util/create_reg_key_work_item.h
diff --git a/chrome/installer/util/create_reg_key_work_item.h b/chrome/installer/util/create_reg_key_work_item.h
index 448cb79d5ea221ee090a6dbae5310a53292044ae..455cb4bc5578ab5b419533cec4e45bed0ed6a8a8 100644
--- a/chrome/installer/util/create_reg_key_work_item.h
+++ b/chrome/installer/util/create_reg_key_work_item.h
@@ -25,7 +25,9 @@ class CreateRegKeyWorkItem : public WorkItem {
  private:
   friend class WorkItem;
 
-  CreateRegKeyWorkItem(HKEY predefined_root, const std::wstring& path);
+  CreateRegKeyWorkItem(HKEY predefined_root,
+                       const std::wstring& path,
+                       REGSAM wow64_access);
 
   // Initialize key_list_ by adding all paths of keys from predefined_root_
   // to path_. Returns true if key_list_ is non empty.
@@ -38,6 +40,9 @@ class CreateRegKeyWorkItem : public WorkItem {
   // Path of the key to be created.
   std::wstring path_;
 
+  // Whether to force 32-bit or 64-bit view of the target key.
+  REGSAM wow64_access_;
+
   // List of paths to all keys that need to be created from predefined_root_
   // to path_.
   std::vector<std::wstring> key_list_;