Hopefully the last of the fixes to get Chrome Frame tests going again. Added ...

chrome_frame/chrome_frame_automation.h

Index: chrome_frame/chrome_frame_automation.h
===================================================================
--- chrome_frame/chrome_frame_automation.h	(revision 29986)
+++ chrome_frame/chrome_frame_automation.h	(working copy)
@@ -240,6 +240,9 @@
   PluginUrlRequest* LookupRequest(int request_id) const;
   bool IsValidRequest(PluginUrlRequest* request) const;
   void CleanupRequests();
+  // For IE the host network stack requests are issued on a separate thread,
+  // which requires the requests to be cleaned up asynchronously.
+  void CleanupAsyncRequests();
 
   void set_use_chrome_network(bool use_chrome_network) {
     use_chrome_network_ = use_chrome_network;