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

content/browser/tab_contents/navigation_controller.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_BROWSER_TAB_CONTENTS_NAVIGATION_CONTROLLER_H_
 #define CONTENT_BROWSER_TAB_CONTENTS_NAVIGATION_CONTROLLER_H_
 #pragma once
 
 #include "build/build_config.h"
 
 #include <string>
 #include <vector>
 
 #include "base/memory/linked_ptr.h"
 #include "base/time.h"
 #include "googleurl/src/gurl.h"
+#include "content/browser/renderer_host/global_request_id.h"
 #include "content/browser/ssl/ssl_manager.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/navigation_type.h"
 #include "content/public/common/page_transition_types.h"
 
 class NavigationEntry;
 class SessionStorageNamespace;
 class SiteInstance;
 class TabContents;
 struct ViewHostMsg_FrameNavigate_Params;
@@ skipping 153 matching lines @@
                content::PageTransition type,
                const std::string& extra_headers);
 
   // Same as LoadURL, but for renderer-initiated navigations.  This state is
   // important for tracking whether to display pending URLs.
   void LoadURLFromRenderer(const GURL& url,
                            const GURL& referrer,
                            content::PageTransition type,
                            const std::string& extra_headers);
 
+  // Behaves like LoadURL() and LoadURLFromRenderer() but marks the new
+  // navigation as being transferred from one RVH to another. In this case the
+  // browser can recycle the old request once the new renderer wants to
+  // navigate.
+  // |transferred_global_request_id| identifies the request ID of the old
+  // request.
+  void TransferURL(
+      const GURL& url,
+      const GURL& referrer,
+      content::PageTransition transition,
+      const std::string& extra_headers,
+      const GlobalRequestID& transferred_global_request_id,
+      bool is_renderer_initiated);
+
   // Loads the current page if this NavigationController was restored from
   // history and the current page has not loaded yet.
   void LoadIfNecessary();
 
   // Renavigation --------------------------------------------------------------
 
   // Navigation relative to the "current entry"
   bool CanGoBack() const;
   bool CanGoForward() const;
   void GoBack();
@@ skipping 287 matching lines @@
   static size_t max_entry_count_;
 
   // If a repost is pending, its type (RELOAD or RELOAD_IGNORING_CACHE),
   // NO_RELOAD otherwise.
   ReloadType pending_reload_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationController);
 };
 
 #endif  // CONTENT_BROWSER_TAB_CONTENTS_NAVIGATION_CONTROLLER_H_