Don't assume that the mime type for documents that mshtml rejects is CF

chrome_frame/urlmon_moniker.cc

 // Copyright (c) 2010 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.
 
 #include "chrome_frame/urlmon_moniker.h"
 
 #include <shlguid.h>
 
 #include "base/string_util.h"
 #include "chrome_frame/bho.h"
@@ skipping 468 matching lines @@
   }
 
   return hr;
 }
 
 // static
 HRESULT MonikerPatch::BindToStorage(IMoniker_BindToStorage_Fn original,
                                     IMoniker* me, IBindCtx* bind_ctx,
                                     IMoniker* to_left, REFIID iid, void** obj) {
   DLOG(INFO) << __FUNCTION__;
-  DCHECK(iid == IID_IStream);
+  DCHECK(iid == IID_IStream || iid == IID_IUnknown);
   DCHECK(to_left == NULL);
 
   HRESULT hr = E_UNEXPECTED;
   NavigationManager* mgr = NavigationManager::GetThreadInstance();
   if (mgr) {
     CComHeapPtr<WCHAR> url;
     hr = me->GetDisplayName(bind_ctx, NULL, &url);
     DCHECK(SUCCEEDED(hr));
     bool interest = mgr->IsTopLevelUrl(url);
     DLOG(INFO) << "interest: " << interest << " url " << url;
@@ skipping 104 matching lines @@
     } else if (cache_out) {
       *cache_out = cache.Detach();
     }
 
     bscb->OnStopBinding(hr, NULL);
   }
 
   return hr;
 }