Fix in-use updates for Chrome Frame.

chrome/installer/util/copy_reg_key_work_item.h

Index: chrome/installer/util/copy_reg_key_work_item.h
diff --git a/chrome/installer/util/copy_reg_key_work_item.h b/chrome/installer/util/copy_reg_key_work_item.h
index b1d463100d1caec2488e530bac2539fb979304ba..cba85fef09036c9e7f2c3bf111f04b428234f61e 100644
--- a/chrome/installer/util/copy_reg_key_work_item.h
+++ b/chrome/installer/util/copy_reg_key_work_item.h
@@ -28,9 +28,11 @@ class CopyRegKeyWorkItem : public WorkItem {
   friend class WorkItem;
 
   // Neither |source_key_path| nor |dest_key_path| may be empty.
+  // Only ALWAYS and IF_NOT_PRESENT are supported for |overwrite_option|.
   CopyRegKeyWorkItem(HKEY predefined_key,
                      const std::wstring& source_key_path,
-                     const std::wstring& dest_key_path);
+                     const std::wstring& dest_key_path,
+                     CopyOverWriteOption overwrite_option);
 
   // Root key in which we operate. The root key must be one of the predefined
   // keys on Windows.
@@ -42,9 +44,14 @@ class CopyRegKeyWorkItem : public WorkItem {
   // Path of the destination key.
   std::wstring dest_key_path_;
 
+  CopyOverWriteOption overwrite_option_;
+
   // Backup of the destination key.
   RegistryKeyBackup backup_;
 
+  // Set to true after the destination is cleared for the copy.
+  bool cleared_destination_;
+
   DISALLOW_COPY_AND_ASSIGN(CopyRegKeyWorkItem);
 };