Don't leave aborted URLs in the omnibox unless we're on a new tab.

content/public/browser/web_contents_delegate.h

Index: content/public/browser/web_contents_delegate.h
diff --git a/content/public/browser/web_contents_delegate.h b/content/public/browser/web_contents_delegate.h
index b869a52af7f64752cdecf2221e02ada453e3e4f8..66d5a6c5738436daf71dea78837f6d10848159fe 100644
--- a/content/public/browser/web_contents_delegate.h
+++ b/content/public/browser/web_contents_delegate.h
@@ -173,6 +173,11 @@ class CONTENT_EXPORT WebContentsDelegate {
   // Default is false.
   virtual bool ShouldSuppressDialogs();
 
+  // Returns whether pending NavigationEntries for aborted browser-initiated
+  // navigations should be preserved (and thus returned from GetVisibleURL).
+  // Defaults to false.
+  virtual bool ShouldPreserveAbortedURLs(WebContents* source);
+
   // Add a message to the console. Returning true indicates that the delegate
   // handled the message. If false is returned the default logging mechanism
   // will be used for the message.