gpu: Add sync token dependencies to flush metadata.

gpu/ipc/service/gpu_command_buffer_stub.cc

Index: gpu/ipc/service/gpu_command_buffer_stub.cc
diff --git a/gpu/ipc/service/gpu_command_buffer_stub.cc b/gpu/ipc/service/gpu_command_buffer_stub.cc
index bfa53ed81777202dd74f2049e9c8d4876db3e015..6d305cf9ab99b670e9d8c743e9ad21c6cbd1161d 100644
--- a/gpu/ipc/service/gpu_command_buffer_stub.cc
+++ b/gpu/ipc/service/gpu_command_buffer_stub.cc
@@ -935,7 +935,8 @@ void GpuCommandBufferStub::CheckCompleteWaits() {
 void GpuCommandBufferStub::OnAsyncFlush(
     int32_t put_offset,
     uint32_t flush_count,
-    const std::vector<ui::LatencyInfo>& latency_info) {
+    const std::vector<ui::LatencyInfo>& latency_info,
+    const std::vector<SyncToken>& sync_token_fences) {
   TRACE_EVENT1(
       "gpu", "GpuCommandBufferStub::OnAsyncFlush", "put_offset", put_offset);
   DCHECK(command_buffer_);