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

content/browser/frame_host/render_frame_host_manager.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_MANAGER_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_
 
 #include <stdint.h>
 
 #include <list>
@@ skipping 497 matching lines @@
   void ActiveFrameCountIsZero(SiteInstanceImpl* site_instance) override;
   void RenderProcessGone(SiteInstanceImpl* site_instance) override;
 
   // Sets up the necessary state for a new RenderViewHost.  If |proxy| is not
   // null, it creates a RenderFrameProxy in the target renderer process which is
   // used to route IPC messages when in swapped out state.  Returns early if the
   // RenderViewHost has already been initialized for another RenderFrameHost.
   bool InitRenderView(RenderViewHostImpl* render_view_host,
     RenderFrameProxyHost* proxy);
 
+  // Terminates and deletes the pending RenderFrameHost.
+  void CancelPending();
+
  private:
   friend class NavigatorTestWithBrowserSideNavigation;
   friend class RenderFrameHostManagerTest;
   friend class TestWebContents;
 
   enum class SiteInstanceRelation {
     // A SiteInstance in a different browsing instance from the current.
     UNRELATED,
     // A SiteInstance in the same browsing instance as the current.
     RELATED,
@@ skipping 175 matching lines @@
   // RenderFrameHost has committed.  |old_render_frame_host| will either be
   // deleted or put on the pending delete list during this call.
   void SwapOutOldFrame(
       std::unique_ptr<RenderFrameHostImpl> old_render_frame_host);
 
   // Discards a RenderFrameHost that was never made active (for active ones
   // SwapOutOldFrame is used instead).
   void DiscardUnusedFrame(
       std::unique_ptr<RenderFrameHostImpl> render_frame_host);
 
-  // Helper method to terminate the pending RenderFrameHost. The frame may be
-  // deleted immediately, or it may be kept around in hopes of later reuse.
-  void CancelPending();
-
   // Clears pending_render_frame_host_, returning it to the caller for disposal.
   std::unique_ptr<RenderFrameHostImpl> UnsetPendingRenderFrameHost();
 
   // Helper method to set the active RenderFrameHost. Returns the old
   // RenderFrameHost and updates counts.
   std::unique_ptr<RenderFrameHostImpl> SetRenderFrameHost(
       std::unique_ptr<RenderFrameHostImpl> render_frame_host);
 
   RenderFrameHostImpl* UpdateStateForNavigate(
       const GURL& dest_url,
@@ skipping 76 matching lines @@
   std::unique_ptr<RenderFrameHostImpl> speculative_render_frame_host_;
 
   base::WeakPtrFactory<RenderFrameHostManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_MANAGER_H_