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

chrome/browser/tab_contents/tab_contents.h

 // Copyright (c) 2009 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_TAB_CONTENTS_TAB_CONTENTS_H_
 #define CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_
 
 #include "build/build_config.h"
 
 #include <map>
@@ skipping 756 matching lines @@
                                 int id,
                                 const GURL& image_url,
                                 bool errored,
                                 const SkBitmap& image);
   virtual void RequestOpenURL(const GURL& url, const GURL& referrer,
                               WindowOpenDisposition disposition);
   virtual void DomOperationResponse(const std::string& json_string,
                                     int automation_id);
   virtual void ProcessDOMUIMessage(const std::string& message,
                                    const std::string& content);
+  virtual void DocumentLoadedInFrame();
   virtual void ProcessExternalHostMessage(const std::string& message,
                                           const std::string& origin,
                                           const std::string& target);
   virtual void GoToEntryAtOffset(int offset);
   virtual void GetHistoryListCount(int* back_list_count,
                                    int* forward_list_count);
   virtual void RunFileChooser(bool multiple_files,
                               const string16& title,
                               const FilePath& default_file);
   virtual void RunJavaScriptMessage(const std::wstring& message,
@@ skipping 269 matching lines @@
   // True if the user has decided to block future javascript messages. This is
   // reset on navigations to false on navigations.
   bool suppress_javascript_messages_;
 
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(TabContents);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_CONTENTS_H_