Implemented new fence syncs which replaces the old sync points.

gpu/command_buffer/client/cmd_buffer_helper.h

Index: gpu/command_buffer/client/cmd_buffer_helper.h
diff --git a/gpu/command_buffer/client/cmd_buffer_helper.h b/gpu/command_buffer/client/cmd_buffer_helper.h
index 8739316b5367720b7b5ff4bef922b5727976cbb1..9ba5ced949452a6767904baf94da6c32428ed501 100644
--- a/gpu/command_buffer/client/cmd_buffer_helper.h
+++ b/gpu/command_buffer/client/cmd_buffer_helper.h
@@ -306,6 +306,16 @@ class GPU_EXPORT CommandBufferHelper
     CalcImmediateEntries(0);
   }
 
+  uint32_t GenerateFenceSyncRelease();
+
+  bool IsFenceSyncRelease(uint32_t release) {
+    return release < next_fence_sync_release_;
+  }
+
+  bool IsFenceSyncFlushed(uint32_t release) {
+    return release <= flushed_fence_sync_release_;
+  }
+
   // Overridden from base::trace_event::MemoryDumpProvider:
   bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
                     base::trace_event::ProcessMemoryDump* pmd) override;
@@ -341,7 +351,9 @@ class GPU_EXPORT CommandBufferHelper
   int32 token_;
   int32 put_;
   int32 last_put_sent_;
-  int32 last_barrier_put_sent_;
+
+  uint32_t next_fence_sync_release_;

[sunnyps, 2015/09/23 21:44:45]

I think this should be part of GpuChannelHost::StreamFlushInfo. That way the id
used for the sync token is { GPU_IO, channel_id << 32 | stream_id, release_count
} and on the service side SyncPointClientState is also a per-stream thing. WDYT?

[David Yen, 2015/09/25 20:13:33]

The command buffer ID should be per context (as that is the level of where
release counts are kept track). I discussed though this has been moved to
GpuControl.

+  uint32_t flushed_fence_sync_release_;
 
 #if defined(CMD_HELPER_PERIODIC_FLUSH_CHECK)
   int commands_issued_;