Add rudimentary support in the ChromeFrame ActiveX to enable it work in a generic client site, i.e.

chrome_frame/chrome_tab.idl

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file will be processed by the MIDL tool to
 // produce the type library (chrome_tab.tlb) and marshalling code.
 
 #include "olectl.h"
 import "oaidl.idl";
 import "ocidl.idl";
@@ skipping 84 matching lines @@
 interface IChromeFramePrivileged : IUnknown {
   // If the host returns false for wants_privileged, the control
   // won't enable privileged mode.
   HRESULT GetWantsPrivileged([out] boolean *wants_privileged);
   // The profile name we want to use.
   HRESULT GetChromeProfileName([out] BSTR *profile_name);
   // Called when an automation version mismatch occurs. Returns S_OK if
   // a dialog should be showed to the user by this CF instance, S_FALSE if
   // not.
   HRESULT ShouldShowVersionMismatchDialog();
+  // Allows the host to return the navigation url during the creation of the
+  // ChromeFrameActiveX instance.
+  HRESULT GetNavigationUrl([out] BSTR* url);
 };
 
 // Expose this service to the ChromeFrame control to trigger privileged
 // mode. If the control is in privileged mode, it will forward messages
 // to the onmessage handler irrespective of origin.
 cpp_quote("#define SID_ChromeFramePrivileged __uuidof(IChromeFramePrivileged)")
 
 typedef enum {
   CF_EVENT_DISPID_ONLOAD = 1,
   CF_EVENT_DISPID_ONLOADERROR,
@@ skipping 65 matching lines @@
   coclass ChromeFrame {
     [default] interface IChromeFrame;
     [default, source] dispinterface DIChromeFrameEvents;
   };
 
   [uuid(ECB3C477-1A0A-44bd-BB57-78F9EFE34FA7)]
   coclass ChromeFrameBHO {
     [default] interface IUnknown;
   };
 };