Don't swap out the old RenderFrameHost until the new one commits.

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 <map>
 #include <vector>
 
@@ skipping 249 matching lines @@
   // this frame, or create one if it doesn't exist yet, otherwise return
   // NULL.
   BrowserAccessibilityManager* GetOrCreateBrowserAccessibilityManager();
 
 #if defined(OS_WIN)
   void SetParentNativeViewAccessible(
       gfx::NativeViewAccessible accessible_parent);
   gfx::NativeViewAccessible GetParentNativeViewAccessible() const;
 #endif
 
-  // Returns whether this RenderFrameHost has an outstanding cross-site request.
-  // Cleared when we hear the response and start to swap out the old
-  // RenderFrameHost, or if we hear a commit here without a network request.
-  bool HasPendingCrossSiteRequest();
-
-  // Sets whether this RenderFrameHost has an outstanding cross-site request,
-  // for which another renderer will need to run an onunload event handler.
-  // This is called before the first navigation event for this RenderFrameHost,
-  // and cleared when we hear the response or commit.
-  void SetHasPendingCrossSiteRequest(bool has_pending_request);
-
  protected:
   friend class RenderFrameHostFactory;
 
   // TODO(nasko): Remove dependency on RenderViewHost here. RenderProcessHost
   // should be the abstraction needed here, but we need RenderViewHost to pass
   // into WebContentsObserver::FrameDetached for now.
   RenderFrameHostImpl(RenderViewHostImpl* render_view_host,
                       RenderFrameHostDelegate* delegate,
                       FrameTree* frame_tree,
                       FrameTreeNode* frame_tree_node,
@@ skipping 144 matching lines @@
   base::Callback<void(ui::AXEvent, int)> accessibility_testing_callback_;
   // The most recently received accessibility tree - for testing only.
   scoped_ptr<ui::AXTree> ax_tree_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderFrameHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_FRAME_HOST_IMPL_H_