Cause Chrome Frame to follow the fast shutdown path, which cleans up infobars and avoids a crash on…

chrome/browser/ui/views/external_tab_container_win.cc

Index: chrome/browser/ui/views/external_tab_container_win.cc
diff --git a/chrome/browser/ui/views/external_tab_container_win.cc b/chrome/browser/ui/views/external_tab_container_win.cc
index 42e67b25860289a9af5faff8b2cdc90f6574fc89..070725cd576f4557d9c5f47b2947f284d95d9b29 100644
--- a/chrome/browser/ui/views/external_tab_container_win.cc
+++ b/chrome/browser/ui/views/external_tab_container_win.cc
@@ -266,6 +266,10 @@ void ExternalTabContainerWin::Uninitialize() {
   if (web_contents_.get()) {
     UnregisterRenderViewHost(web_contents_->GetRenderViewHost());
 
+    // Explicitly tell the RPH to shutdown, as doing so is the only thing that
+    // cleans up certain resources like infobars (crbug.com/148398).
+    web_contents_->GetRenderProcessHost()->FastShutdownIfPossible();
+
     if (GetWidget()->GetRootView())
       GetWidget()->GetRootView()->RemoveAllChildViews(true);