Force COM machinery to notice that the path to the DelegateExecute verb handler has changed.

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 b8b31fdea58869dfd53dd4ae866322323ea55f7b..74955db214ba20819db32424fe7f08bbed4ab413 100644
--- a/chrome/installer/util/work_item.h
+++ b/chrome/installer/util/work_item.h
@@ -15,7 +15,9 @@
 #include <vector>
 
 #include "base/basictypes.h"
+#include "base/callback.h"
 
+class CallbackWorkItem;
 class CopyRegKeyWorkItem;
 class CopyTreeWorkItem;
 class CreateDirWorkItem;
@@ -58,6 +60,10 @@ class WorkItem {
 
   virtual ~WorkItem();
 
+  // Create a CallbackWorkItem that invokes a callback.
+  static CallbackWorkItem* CreateCallbackWorkItem(
+      base::Callback<bool(const CallbackWorkItem&)> callback);
+
   // Create a CopyRegKeyWorkItem that recursively copies a given registry key.
   static CopyRegKeyWorkItem* CreateCopyRegKeyWorkItem(
       HKEY predefined_root,
@@ -176,6 +182,11 @@ class WorkItem {
     ignore_failure_ = ignore_failure;
   }
 
+  // Returns true if this WorkItem should ignore failures.
+  bool ignore_failure() const {
+    return ignore_failure_;
+  }
+
   // Sets an optional log message that a work item may use to print additional
   // instance-specific information.
   void set_log_message(const std::string& log_message) {
@@ -183,7 +194,7 @@ class WorkItem {
   }
 
   // Retrieves the optional log message. The retrieved string may be empty.
-  std::string log_message() { return log_message_; }
+  const std::string& log_message() const { return log_message_; }
 
  protected:
   WorkItem();