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

content/browser/frame_host/navigator_delegate.h

Index: content/browser/frame_host/navigator_delegate.h
diff --git a/content/browser/frame_host/navigator_delegate.h b/content/browser/frame_host/navigator_delegate.h
index e92dbeee495bf9beb5b4529ccedc8866d569dc46..369ee8fec1572baf23796010a1c6d15a521a6c56 100644
--- a/content/browser/frame_host/navigator_delegate.h
+++ b/content/browser/frame_host/navigator_delegate.h
@@ -99,6 +99,10 @@ class CONTENT_EXPORT NavigatorDelegate {
   // this forwards to.
   virtual void RequestOpenURL(RenderFrameHostImpl* render_frame_host,
                               const OpenURLParams& params) {}
+
+  // Returns whether URLs for aborted browser-initiated navigations should be
+  // preserved in the omnibox.  Defaults to false.
+  virtual bool ShouldPreserveAbortedURLs();
 };
 
 }  // namspace content