Added CopyRegKeyWorkItem in support of IE low rights policy fixes.

chrome/installer/util/work_item.h

Index: chrome/installer/util/work_item.h
diff --git a/chrome/installer/util/work_item.h b/chrome/installer/util/work_item.h
index a4c8f6ebe16f0d6cc395a4604c50b5531b1e8a24..cbe9665835b71875a3f8cec481cfc471f08cdbb4 100644
--- a/chrome/installer/util/work_item.h
+++ b/chrome/installer/util/work_item.h
@@ -17,6 +17,7 @@
 
 #include "base/basictypes.h"
 
+class CopyRegKeyWorkItem;
 class CopyTreeWorkItem;
 class CreateDirWorkItem;
 class CreateRegKeyWorkItem;
@@ -58,6 +59,12 @@ class WorkItem {
 
   virtual ~WorkItem();
 
+  // Create a CopyRegKeyWorkItem that recursively copies a given registry key.
+  static CopyRegKeyWorkItem* CreateCopyRegKeyWorkItem(
+      HKEY predefined_root,
+      const std::wstring& source_key_path,
+      const std::wstring& dest_key_path);
+
   // Create a CopyTreeWorkItem that recursively copies a file system hierarchy
   // from source path to destination path.
   // * If overwrite_option is ALWAYS, the created CopyTreeWorkItem always