Ensure we don't crash if user navigates back from NTP to Chrome sign-in page before it has fully lo…

content/public/browser/navigation_controller.h

Index: content/public/browser/navigation_controller.h
diff --git a/content/public/browser/navigation_controller.h b/content/public/browser/navigation_controller.h
index 3b93ef145a864001b4d5bf61b93f56e99b330f98..ed4c4498af5e5a4360d3cba96467959e7875dd98 100644
--- a/content/public/browser/navigation_controller.h
+++ b/content/public/browser/navigation_controller.h
@@ -330,10 +330,10 @@ class NavigationController {
 
   // Removing of entries -------------------------------------------------------
 
-  // Removes the entry at the specified |index|.  This call dicards any pending
-  // and transient entries.  If the index is the last committed index, this does
-  // nothing and returns false.
-  virtual void RemoveEntryAtIndex(int index) = 0;
+  // Removes the entry at the specified |index|.  This call discards any
+  // transient entries.  If the index is the last committed index or the pending
+  // entry, this does nothing and returns false.
+  virtual bool RemoveEntryAtIndex(int index) = 0;
 
   // Random --------------------------------------------------------------------