Eliminate redundancy in the parameters to NotifyEntryChanged.

content/browser/frame_host/navigation_controller_impl.cc

Index: content/browser/frame_host/navigation_controller_impl.cc
diff --git a/content/browser/frame_host/navigation_controller_impl.cc b/content/browser/frame_host/navigation_controller_impl.cc
index b9d69554539a2ca922f8ad008f743cfff7303dfd..6ac3a106994a024a5e0fa0837bb3280799c4a58b 100644
--- a/content/browser/frame_host/navigation_controller_impl.cc
+++ b/content/browser/frame_host/navigation_controller_impl.cc
@@ -1910,11 +1910,12 @@ void NavigationControllerImpl::LoadIfNecessary() {
   NavigateToPendingEntry(NO_RELOAD);
 }
 
-void NavigationControllerImpl::NotifyEntryChanged(const NavigationEntry* entry,
-                                                  int index) {
+void NavigationControllerImpl::NotifyEntryChanged(
+    const NavigationEntry* entry) {
   EntryChangedDetails det;
   det.changed_entry = entry;
-  det.index = index;
+  det.index = GetIndexOfEntry(
+      NavigationEntryImpl::FromNavigationEntry(entry));
   NotificationService::current()->Notify(
       NOTIFICATION_NAV_ENTRY_CHANGED,
       Source<NavigationController>(this),