Add hooks for capturing meaningful text info, gently.

Source/core/loader/NavigationScheduler.cpp

Index: Source/core/loader/NavigationScheduler.cpp
diff --git a/Source/core/loader/NavigationScheduler.cpp b/Source/core/loader/NavigationScheduler.cpp
index ede1efdeac3bf0283535af9a9279cbce220204b3..31930fa631041094236e819a837eb26d1dd57c09 100644
--- a/Source/core/loader/NavigationScheduler.cpp
+++ b/Source/core/loader/NavigationScheduler.cpp
@@ -88,6 +88,7 @@ public:
     Document* originDocument() const { return m_originDocument.get(); }
     bool replacesCurrentItem() const { return m_replacesCurrentItem; }
     bool isLocationChange() const { return m_isLocationChange; }
+    virtual bool isRedirect() const { return false; }
     PassOwnPtr<UserGestureIndicator> createUserGestureIndicator()
     {
         if (m_wasUserGesture &&  m_userGestureToken)
@@ -158,6 +159,9 @@ public:
         request.setClientRedirect(ClientRedirect);
         frame->loader().load(request);
     }
+
+    bool isRedirect() const override { return true; }
+
 private:
     ScheduledRedirect(double delay, Document* originDocument, const String& url, bool replacesCurrentItem)
         : ScheduledURLNavigation(delay, originDocument, url, replacesCurrentItem, false)
@@ -279,6 +283,11 @@ bool NavigationScheduler::locationChangePending()
     return m_redirect && m_redirect->isLocationChange();
 }
 
+bool NavigationScheduler::isRedirect() const
+{
+    return m_redirect && m_redirect->isRedirect();
+}
+
 inline bool NavigationScheduler::shouldScheduleReload() const
 {
     return m_frame->page() && isFrameNavigationAllowed() && NavigationDisablerForBeforeUnload::isNavigationAllowed();