Consider an immediate redirect as machine-initiated and slow one as...

chrome/browser/renderer_host/render_view_host_delegate.h

 // Copyright (c) 2006-2008 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 CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 266 matching lines @@
                                    const std::string& content) { }
 
   // A message for external host. By default we ignore such messages.
   // |receiver| can be a receiving script and |message| is any
   // arbitrary string that makes sense to the receiver.
   virtual void ProcessExternalHostMessage(const std::string& message,
                                           const std::string& origin,
                                           const std::string& target) {
   }
 
+  // A document has been loaded in a frame.
+  virtual void DocumentLoadedInFrame() {
+  }
+
   // Navigate to the history entry for the given offset from the current
   // position within the NavigationController.  Makes no change if offset is
   // not valid.
   virtual void GoToEntryAtOffset(int offset) { }
 
   // The page requests the size of the back and forward lists
   // within the NavigationController.
   virtual void GetHistoryListCount(int* back_list_count,
                                    int* forward_list_count) { }
 
@@ skipping 137 matching lines @@
 
   // A find operation in the current page completed.
   virtual void OnFindReply(int request_id,
                            int number_of_matches,
                            const gfx::Rect& selection_rect,
                            int active_match_ordinal,
                            bool final_update) { }
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_DELEGATE_H_