Don't load subframe history items if a client redirect occurs during load.

content/browser/frame_host/render_frame_host_impl.h

 // Copyright 2013 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_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 630 matching lines @@
                            RenderViewHostIsNotReusedAfterDelayedSwapOutACK);
 
   // IPC Message handlers.
   void OnAddMessageToConsole(int32_t level,
                              const base::string16& message,
                              int32_t line_no,
                              const base::string16& source_id);
   void OnDetach();
   void OnFrameFocused();
   void OnOpenURL(const FrameHostMsg_OpenURL_Params& params);
+  void OnCancelInitialHistoryLoad();
   void OnDocumentOnLoadCompleted(
       FrameMsg_UILoadMetricsReportType::Value report_type,
       base::TimeTicks ui_timestamp);
   void OnDidStartProvisionalLoad(
       const GURL& url,
       const base::TimeTicks& navigation_start);
   void OnDidFailProvisionalLoadWithError(
       const FrameHostMsg_DidFailProvisionalLoadWithError_Params& params);
   void OnDidFailLoadWithError(
       const GURL& url,
@@ skipping 396 matching lines @@
 
   // NOTE: This must be the last member.
   base::WeakPtrFactory<RenderFrameHostImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_