Add hooks for capturing meaningful text info, gently.

Source/core/loader/NavigationScheduler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2009 Adam Barth. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
@@ skipping 140 matching lines @@
     void fire(LocalFrame* frame) override
     {
         OwnPtr<UserGestureIndicator> gestureIndicator = createUserGestureIndicator();
         FrameLoadRequest request(originDocument(), url(), "_self");
         request.setReplacesCurrentItem(replacesCurrentItem());
         if (equalIgnoringFragmentIdentifier(frame->document()->url(), request.resourceRequest().url()))
             request.resourceRequest().setCachePolicy(ReloadIgnoringCacheData);
         request.setClientRedirect(ClientRedirect);
         frame->loader().load(request);
     }
+
 private:
     ScheduledRedirect(double delay, Document* originDocument, const String& url, bool replacesCurrentItem)
         : ScheduledURLNavigation(delay, originDocument, url, replacesCurrentItem, false)
     {
         clearUserGesture();
     }
 };
 
 class ScheduledLocationChange final : public ScheduledURLNavigation {
 public:
@@ skipping 101 matching lines @@
 
 NavigationScheduler::~NavigationScheduler()
 {
 }
 
 bool NavigationScheduler::locationChangePending()
 {
     return m_redirect && m_redirect->isLocationChange();
 }
 
+bool NavigationScheduler::isNavigationScheduled() const
+{
+    return m_redirect;
+}
+
 inline bool NavigationScheduler::shouldScheduleReload() const
 {
     return m_frame->page() && isFrameNavigationAllowed() && NavigationDisablerForBeforeUnload::isNavigationAllowed();
 }
 
 inline bool NavigationScheduler::shouldScheduleNavigation(const String& url) const
 {
     return m_frame->page() && isFrameNavigationAllowed() && (protocolIsJavaScript(url) || NavigationDisablerForBeforeUnload::isNavigationAllowed());
 }
 
@@ skipping 132 matching lines @@
     m_redirect.clear();
 }
 
 DEFINE_TRACE(NavigationScheduler)
 {
     visitor->trace(m_frame);
     visitor->trace(m_redirect);
 }
 
 } // namespace blink