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diff --git a/gfx/angle/src/libANGLE/Fence.h b/gfx/angle/src/libANGLE/Fence.h
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+//
+// Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// Fence.h: Defines the gl::FenceNV and gl::FenceSync classes, which support the GL_NV_fence
+// extension and GLES3 sync objects.
+
+#ifndef LIBANGLE_FENCE_H_
+#define LIBANGLE_FENCE_H_
+
+#include "libANGLE/Debug.h"
+#include "libANGLE/Error.h"
+#include "libANGLE/RefCountObject.h"
+
+#include "common/angleutils.h"
+
+namespace rx
+{
+class FenceNVImpl;
+class FenceSyncImpl;
+}
+
+namespace gl
+{
+
+class FenceNV final : angle::NonCopyable
+{
+ public:
+ explicit FenceNV(rx::FenceNVImpl *impl);
+ virtual ~FenceNV();
+
+ Error set(GLenum condition);
+ Error test(GLboolean *outResult);
+ Error finish();
+
+ bool isSet() const { return mIsSet; }
+ GLboolean getStatus() const { return mStatus; }
+ GLenum getCondition() const { return mCondition; }
+
+ private:
+ rx::FenceNVImpl *mFence;
+
+ bool mIsSet;
+
+ GLboolean mStatus;
+ GLenum mCondition;
+};
+
+class FenceSync final : public RefCountObject, public LabeledObject
+{
+ public:
+ FenceSync(rx::FenceSyncImpl *impl, GLuint id);
+ virtual ~FenceSync();
+
+ void setLabel(const std::string &label) override;
+ const std::string &getLabel() const override;
+
+ Error set(GLenum condition, GLbitfield flags);
+ Error clientWait(GLbitfield flags, GLuint64 timeout, GLenum *outResult);
+ Error serverWait(GLbitfield flags, GLuint64 timeout);
+ Error getStatus(GLint *outResult) const;
+
+ GLenum getCondition() const { return mCondition; }
+ GLbitfield getFlags() const { return mFlags; }
+
+ private:
+ rx::FenceSyncImpl *mFence;
+
+ std::string mLabel;
+
+ GLenum mCondition;
+ GLbitfield mFlags;
+};
+
+}
+
+#endif // LIBANGLE_FENCE_H_