Allow showing pending URL for new tab navigations, but only if safe.

content/browser/web_contents/navigation_controller_impl.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_BROWSER_WEB_CONTENTS_NAVIGATION_CONTROLLER_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_NAVIGATION_CONTROLLER_IMPL_H_
 
 #include "build/build_config.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
@@ skipping 102 matching lines @@
       int32 page_id) const;
 
   // WebContentsImpl -----------------------------------------------------------
 
   WebContentsImpl* web_contents() const {
     return web_contents_;
   }
 
   // For use by WebContentsImpl ------------------------------------------------
 
+  // Allow renderer-initiated navigations to create a pending entry when the
+  // provisional load starts.
+  void SetPendingEntry(content::NavigationEntryImpl* entry);
+
   // Handles updating the navigation state after the renderer has navigated.
   // This is used by the WebContentsImpl.
   //
   // If a new entry is created, it will return true and will have filled the
   // given details structure and broadcast the NOTIFY_NAV_ENTRY_COMMITTED
   // notification. The caller can then use the details without worrying about
   // listening for the notification.
   //
   // In the case that nothing has changed, the details structure is undefined
   // and it will return false.
@@ skipping 289 matching lines @@
   // the timer resolution, leading to things sometimes showing up in
   // the wrong order in the history view.
   TimeSmoother time_smoother_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationControllerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_NAVIGATION_CONTROLLER_IMPL_H_