net: Implement canceling of all async operations in FileStream.

net/base/net_log_event_type_list.h

Index: net/base/net_log_event_type_list.h
diff --git a/net/base/net_log_event_type_list.h b/net/base/net_log_event_type_list.h
index 661fb6c1ee23b029460dc626d0be604c5577ac03..4cde922dfa19ec32776960a4fc245672b308016a 100644
--- a/net/base/net_log_event_type_list.h
+++ b/net/base/net_log_event_type_list.h
@@ -1702,10 +1702,6 @@ EVENT_TYPE(FILE_STREAM_BOUND_TO_OWNER)
 //   }
 EVENT_TYPE(FILE_STREAM_OPEN)
 
-// This event is created when a file stream's Close() is called.
-// This may occur even when the file is not open.
-EVENT_TYPE(FILE_STREAM_CLOSE)
-
 // This event is created when a file stream operation has an error.
 //   {
 //     "operation": <open, write, close, etc>,