Clear old verified flush IDs when doing OrderingBarrier.

gpu/ipc/client/gpu_channel_host.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/ipc/client/gpu_channel_host.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/atomic_sequence_num.h"
@@ skipping 117 matching lines @@
   return result;
 }
 
 uint32_t GpuChannelHost::OrderingBarrier(
     int32_t route_id,
     int32_t stream_id,
     int32_t put_offset,
     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;
     flush_info.route_id = route_id;
     flush_info.put_offset = put_offset;
     flush_info.flush_count = flush_count;
     flush_info.flush_id = flush_id;
     flush_info.latency_info.insert(flush_info.latency_info.end(),
                                    latency_info.begin(), latency_info.end());
 
@@ skipping 266 matching lines @@
 
   listeners_.clear();
 }
 
 bool GpuChannelHost::MessageFilter::IsLost() const {
   AutoLock lock(lock_);
   return lost_;
 }
 
 }  // namespace gpu