Remove dead NavigationControllerImpl::IsRedirect.

content/browser/frame_host/navigation_controller_impl.h

Index: content/browser/frame_host/navigation_controller_impl.h
diff --git a/content/browser/frame_host/navigation_controller_impl.h b/content/browser/frame_host/navigation_controller_impl.h
index 9177914504ea11308af1037ed5e3b11c32685fbe..3ba1b59cb7fa1fc02269c21e41e493051568228c 100644
--- a/content/browser/frame_host/navigation_controller_impl.h
+++ b/content/browser/frame_host/navigation_controller_impl.h
@@ -306,9 +306,6 @@ class CONTENT_EXPORT NavigationControllerImpl
   // must ensure that |CanPruneAllButVisible| returns true before calling this.
   void PruneAllButVisibleInternal();
 
-  // Returns true if the navigation is redirect.
-  bool IsRedirect(const ViewHostMsg_FrameNavigate_Params& params);
-
   // Returns true if the navigation is likley to be automatic rather than
   // user-initiated.
   bool IsLikelyAutoNavigation(base::TimeTicks now);