Move files instead of copying them.

chrome/installer/util/work_item.cc

Index: chrome/installer/util/work_item.cc
diff --git a/chrome/installer/util/work_item.cc b/chrome/installer/util/work_item.cc
index 790540531e82653dc06cd94e0c0df50d0b658bb8..568a79d2db5fd99c3bdf7bbfb34db34ad185158e 100644
--- a/chrome/installer/util/work_item.cc
+++ b/chrome/installer/util/work_item.cc
@@ -9,6 +9,7 @@
 #include "chrome/installer/util/create_reg_key_work_item.h"
 #include "chrome/installer/util/delete_tree_work_item.h"
 #include "chrome/installer/util/delete_reg_value_work_item.h"
+#include "chrome/installer/util/move_tree_work_item.h"
 #include "chrome/installer/util/set_reg_value_work_item.h"
 #include "chrome/installer/util/work_item_list.h"
 
@@ -46,6 +47,12 @@ DeleteTreeWorkItem* WorkItem::CreateDeleteTreeWorkItem(std::wstring root_path,
   return new DeleteTreeWorkItem(root_path, key_path);
 }
 
+MoveTreeWorkItem* WorkItem::CreateMoveTreeWorkItem(std::wstring source_path,
+                                                   std::wstring dest_path,
+                                                   std::wstring temp_dir) {
+  return new MoveTreeWorkItem(source_path, dest_path, temp_dir);
+}
+
 SetRegValueWorkItem* WorkItem::CreateSetRegValueWorkItem(
     HKEY predefined_root, std::wstring key_path,
     std::wstring value_name, std::wstring value_data, bool overwrite) {