--- old/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	2019-02-15 19:02:24.891271703 +0300
+++ new/src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp	2019-02-15 19:02:24.799274921 +0300
@@ -75,7 +75,6 @@
 class G1OldTracer;
 class EvacuationFailedInfo;
 class nmethod;
-class Ticks;
 
 typedef OverflowTaskQueue<StarTask, mtGC>         RefToScanQueue;
 typedef GenericTaskQueueSet<RefToScanQueue, mtGC> RefToScanQueueSet;