Added |load_completion_status| to WebStateObserver's |PageLoaded|.

ios/web/public/web_state/web_state_observer.h

Index: ios/web/public/web_state/web_state_observer.h
diff --git a/ios/web/public/web_state/web_state_observer.h b/ios/web/public/web_state/web_state_observer.h
index bc43b48bcd268b6835a04539e117f118e0fb8e8b..ac6f9d274771608fdc1258bb445ca7b0435ded83 100644
--- a/ios/web/public/web_state/web_state_observer.h
+++ b/ios/web/public/web_state/web_state_observer.h
@@ -13,6 +13,8 @@ struct LoadCommittedDetails;
 class WebState;
 class WebStateImpl;
 
+enum class PageLoadCompletionStatus : bool { SUCCESS = 0, FAILURE = 1 };

[stuartmorgan, 2015/01/06 23:43:57]

This feels pretty compressed; unless git cl format did this I'd prefer line
breaks after { and , and before }

+
 // An observer API implemented by classes which are interested in various page
 // load events from WebState.
 class WebStateObserver {
@@ -28,7 +30,7 @@ class WebStateObserver {
       const LoadCommittedDetails& load_details) {}
 
   // Called when the current page is loaded.
-  virtual void PageLoaded() {}
+  virtual void PageLoaded(PageLoadCompletionStatus load_completion_status) {}
 
   // Called on URL hash change events.
   virtual void URLHashChanged() {}