Clear old verified flush IDs when doing OrderingBarrier.

gpu/ipc/client/gpu_channel_host.cc

Index: gpu/ipc/client/gpu_channel_host.cc
diff --git a/gpu/ipc/client/gpu_channel_host.cc b/gpu/ipc/client/gpu_channel_host.cc
index beeaa15bfd167cb62ac35d4eeb961cd92a688723..876aa253b27489e15a1b1a228c8cc27e54567905 100644
--- a/gpu/ipc/client/gpu_channel_host.cc
+++ b/gpu/ipc/client/gpu_channel_host.cc
@@ -135,12 +135,15 @@ uint32_t GpuChannelHost::OrderingBarrier(
     uint32_t flush_count,
     const std::vector<ui::LatencyInfo>& latency_info,
     bool put_offset_changed,
-    bool do_flush) {
+    bool do_flush,
+    uint32_t* highest_verified_flush_id) {
   AutoLock lock(context_lock_);
   StreamFlushInfo& flush_info = stream_flush_info_[stream_id];
   if (flush_info.flush_pending && flush_info.route_id != route_id)
     InternalFlush(&flush_info);
 
+  *highest_verified_flush_id = flush_info.verified_stream_flush_id;
+
   if (put_offset_changed) {
     const uint32_t flush_id = flush_info.next_stream_flush_id++;
     flush_info.flush_pending = true;