Remove dead NavigationControllerImpl::IsRedirect.

BUG=none
TEST=No behavior change.

Review URL: https://codereview.chromium.org/59863004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233160 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/frame_host/navigation_controller_impl.cc

@@ -966,16 +966,6 @@ NavigationType NavigationControllerImpl::ClassifyNavigation(
   return NAVIGATION_TYPE_EXISTING_PAGE;
 }
 
-bool NavigationControllerImpl::IsRedirect(
-  const ViewHostMsg_FrameNavigate_Params& params) {
-  // For main frame transition, we judge by params.transition.
-  // Otherwise, by params.redirects.
-  if (PageTransitionIsMainFrame(params.transition)) {
-    return PageTransitionIsRedirect(params.transition);
-  }
-  return params.redirects.size() > 1;
-}
-
 void NavigationControllerImpl::RendererDidNavigateToNewPage(
     const ViewHostMsg_FrameNavigate_Params& params, bool replace_entry) {
   NavigationEntryImpl* new_entry;

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);