Fix a bug where redirect chain gets lost on process swap.

content/public/renderer/navigation_state.h

 // Copyright (c) 2011 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_RENDERER_NAVIGATION_STATE_H_
 #define CONTENT_PUBLIC_RENDERER_NAVIGATION_STATE_H_
 #pragma once
 
 #include "content/public/common/page_transition_types.h"
 
@@ skipping 39 matching lines @@
   bool request_committed() const { return request_committed_; }
   void set_request_committed(bool value) { request_committed_ = value; }
 
   // True if this navigation was not initiated via WebFrame::LoadRequest.
   bool is_content_initiated() const { return is_content_initiated_; }
 
   // True iff the frame's navigation was within the same page.
   void set_was_within_same_page(bool value) { was_within_same_page_ = value; }
   bool was_within_same_page() const { return was_within_same_page_; }
 
+  // transferred_request_child_id and transferred_request_request_id identify
+  // a request that has been created before the navigation is being transferred
+  // to a new renderer. This is used to recycle the old request once the new
+  // renderer tries to pick up the navigation of the old one.
+  void set_transferred_request_child_id(int value) {
+    transferred_request_child_id_ = value;
+  }
+  int transferred_request_child_id() const {
+    return transferred_request_child_id_;
+  }
+  void set_transferred_request_request_id(int value) {
+    transferred_request_request_id_ = value;
+  }
+  int transferred_request_request_id() const {
+    return transferred_request_request_id_;
+  }
+
  private:
   NavigationState(content::PageTransition transition_type,
                   bool is_content_initiated,
                   int32 pending_page_id,
                   int pending_history_list_offset);
 
   content::PageTransition transition_type_;
   bool request_committed_;
   bool is_content_initiated_;
   int32 pending_page_id_;
   int pending_history_list_offset_;
 
   bool was_within_same_page_;
+  int transferred_request_child_id_;
+  int transferred_request_request_id_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationState);
 };
 
 #endif  // CONTENT_PUBLIC_RENDERER_NAVIGATION_STATE_H_
 
 }  // namespace content