Added support for multiple parameters to Extension API callbacks.

chrome/browser/history/history_extension_api.cc

Index: chrome/browser/history/history_extension_api.cc
diff --git a/chrome/browser/history/history_extension_api.cc b/chrome/browser/history/history_extension_api.cc
index a55d0958cc4ee55c105bdb4c47ef8852a0df3aab..4848fc2a97507897007e8eccafc9dd2f7383e123 100644
--- a/chrome/browser/history/history_extension_api.cc
+++ b/chrome/browser/history/history_extension_api.cc
@@ -265,7 +265,7 @@ void GetVisitsHistoryFunction::QueryComplete(
       AddVisitNode(*iterator, list);
     }
   }
-  result_.reset(list);
+  SetResult(list);
   SendAsyncResponse();
 }
 
@@ -318,7 +318,7 @@ void SearchHistoryFunction::SearchComplete(
       AddHistoryNode(**iterator, list);
     }
   }
-  result_.reset(list);
+  SetResult(list);
   SendAsyncResponse();
 }