Adding a privileged callback used in IE CF to check whether to show...

ceee/ie/plugin/toolband/tool_band.cc

Index: ceee/ie/plugin/toolband/tool_band.cc
===================================================================
--- ceee/ie/plugin/toolband/tool_band.cc	(revision 65052)
+++ ceee/ie/plugin/toolband/tool_band.cc	(working copy)
@@ -234,6 +234,12 @@
   return S_FALSE;
 }
 
+STDMETHODIMP ToolBand::ShouldShowVersionMismatchDialog() {
+  // Only the toolband shows the warning dialog, meaning it gets shown once
+  // per tab.
+  return S_OK;
+}
+
 HRESULT ToolBand::Initialize(IUnknown* site) {
   TRACE_EVENT_INSTANT("ceee.toolband.initialize", this, "");