Eliminate redundancy in the parameters to NotifyEntryChanged.

content/browser/frame_host/navigation_entry_impl.cc

Index: content/browser/frame_host/navigation_entry_impl.cc
diff --git a/content/browser/frame_host/navigation_entry_impl.cc b/content/browser/frame_host/navigation_entry_impl.cc
index c2b7675519eedc753a6aaa720c64f54fb45f489f..f7196a082ac7c30ccb3f6d1b679145c2d8ea4c8b 100644
--- a/content/browser/frame_host/navigation_entry_impl.cc
+++ b/content/browser/frame_host/navigation_entry_impl.cc
@@ -51,6 +51,11 @@ NavigationEntryImpl* NavigationEntryImpl::FromNavigationEntry(
   return static_cast<NavigationEntryImpl*>(entry);
 }
 
+const NavigationEntryImpl* NavigationEntryImpl::FromNavigationEntry(
+    const NavigationEntry* entry) {
+  return static_cast<const NavigationEntryImpl*>(entry);
+}
+
 NavigationEntryImpl::NavigationEntryImpl()
     : NavigationEntryImpl(nullptr, -1, GURL(), Referrer(), base::string16(),
                           ui::PAGE_TRANSITION_LINK, false) {