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

content/public/browser/web_contents_delegate.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 155 matching lines @@
   // an empty rect.
   virtual gfx::Rect GetRootWindowResizerRect() const;
 
   // Invoked prior to showing before unload handler confirmation dialog.
   virtual void WillRunBeforeUnloadConfirm() {}
 
   // Returns true if javascript dialogs and unload alerts are suppressed.
   // Default is false.
   virtual bool ShouldSuppressDialogs();
 
+  // Returns whether URLs for aborted browser-initiated navigations should be
+  // preserved in the omnibox.  Defaults to false.

[jam, 2014/04/21 07:31:08]

nit: avoid mentioning omnibox in content since that's a chrome feature. explain
it instead in terms of content-level objects, i.e. pending entry

[Charlie Reis, 2014/04/21 17:29:00]

Done.

+  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.
   virtual bool AddMessageToConsole(WebContents* source,
                                    int32 level,
                                    const base::string16& message,
                                    int32 line_no,
                                    const base::string16& source_id);
 
   // Tells us that we've finished firing this tab's beforeunload event.
@@ skipping 287 matching lines @@
   // Called when |this| is no longer the WebContentsDelegate for |source|.
   void Detach(WebContents* source);
 
   // The WebContents that this is currently a delegate for.
   std::set<WebContents*> attached_contents_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_