Fix the html select tag showing up at the wrong position. This was a regression from r166446.

content/browser/web_contents/interstitial_page_impl.cc

Index: content/browser/web_contents/interstitial_page_impl.cc
===================================================================
--- content/browser/web_contents/interstitial_page_impl.cc	(revision 168623)
+++ content/browser/web_contents/interstitial_page_impl.cc	(working copy)
@@ -250,6 +250,9 @@
     // already showing. That would result in bad things (unparented HWND on
     // Windows for example) happening.
     old_view->Show();
+    // WebContentsView implementations cached a pointer to the interstitial view
+    // when we created it, so set the old original back.
+    web_contents_->GetView()->SetView(old_view);
   }
 
   // If the focus was on the interstitial, let's keep it to the page.