ui: Add libsync GLFence implementation.

gpu/ipc/client/gpu_fence_impl_shared_event.cc

+// Copyright 2016 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_fence_impl_shared_event.h"
+
+namespace gpu {
+
+GpuFenceImplSharedEvent::GpuFenceImplSharedEvent() {}
+
+GpuFenceImplSharedEvent::GpuFenceImplSharedEvent(
+    const gfx::SharedEventHandle& handle)
+    : shared_event_(handle) {}
+
+GpuFenceImplSharedEvent::~GpuFenceImplSharedEvent() {}
+
+bool GpuFenceImplSharedEvent::IsSignaled() {
+  return shared_event_.IsSignaled();
+}
+
+bool GpuFenceImplSharedEvent::Wait(const base::TimeDelta& max_time) {
+  return shared_event_.Wait(max_time);
+}
+
+void GpuFenceImplSharedEvent::Reset() {
+  return shared_event_.Reset();
+}
+
+gfx::GpuFenceHandle GpuFenceImplSharedEvent::GetHandle() const {
+  gfx::GpuFenceHandle handle;
+  handle.shared_event_handle = shared_event_.GetHandle();
+  return handle;
+}
+
+}  // namespace gpu