Replaced some callbacks with commend SuccessCallback and ErrorCallback

BUG: 24267885
Change-Id: Id2f928d3571ad620ddeef6e98dbc06d8ade514fe
Reviewed-on: https://weave-review.googlesource.com/1157
Reviewed-by: Vitaly Buka <vitalybuka@google.com>
diff --git a/libweave/examples/ubuntu/ssl_stream.cc b/libweave/examples/ubuntu/ssl_stream.cc
index 71d5148..a54578d 100644
--- a/libweave/examples/ubuntu/ssl_stream.cc
+++ b/libweave/examples/ubuntu/ssl_stream.cc
@@ -16,8 +16,8 @@
   CancelPendingOperations();
 }
 
-void SSLStream::RunDelayedTask(const base::Closure& success_callback) {
-  success_callback.Run();
+void SSLStream::RunDelayedTask(const base::Closure& task) {
+  task.Run();
 }
 
 void SSLStream::Read(void* buffer,