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

content/public/browser/web_contents_delegate.cc

Index: content/public/browser/web_contents_delegate.cc
diff --git a/content/public/browser/web_contents_delegate.cc b/content/public/browser/web_contents_delegate.cc
index 22430da89089b4fbb42cb8589513e797121e54d9..5346c2aee77555c4b7deb735c094c2094d8cfe19 100644
--- a/content/public/browser/web_contents_delegate.cc
+++ b/content/public/browser/web_contents_delegate.cc
@@ -37,6 +37,10 @@ bool WebContentsDelegate::ShouldSuppressDialogs() {
   return false;
 }
 
+bool WebContentsDelegate::ShouldPreserveAbortedURLs(WebContents* source) {
+  return false;
+}
+
 bool WebContentsDelegate::AddMessageToConsole(WebContents* source,
                                               int32 level,
                                               const base::string16& message,