diff -r 000000000000 -r 6474c204b198 gfx/angle/src/libGLESv2/renderer/FenceImpl.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/angle/src/libGLESv2/renderer/FenceImpl.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+//
+// Copyright (c) 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.
+//
+
+// FenceImpl.h: Defines the rx::FenceImpl class.
+
+#ifndef LIBGLESV2_RENDERER_FENCEIMPL_H_
+#define LIBGLESV2_RENDERER_FENCEIMPL_H_
+
+#include "common/angleutils.h"
+
+namespace rx
+{
+
+class FenceImpl
+{
+  public:
+    FenceImpl() : mStatus(GL_FALSE), mCondition(GL_NONE) { };
+    virtual ~FenceImpl() { };
+
+    virtual GLboolean isFence() = 0;
+    virtual void setFence(GLenum condition) = 0;
+    virtual GLboolean testFence() = 0;
+    virtual void finishFence() = 0;
+    virtual void getFenceiv(GLenum pname, GLint *params) = 0;
+
+  protected:
+    void setStatus(GLboolean status) { mStatus = status; }
+    GLboolean getStatus() const { return mStatus; }
+
+    void setCondition(GLuint condition) { mCondition = condition; }
+    GLuint getCondition() const { return mCondition; }
+
+  private:
+    DISALLOW_COPY_AND_ASSIGN(FenceImpl);
+
+    GLboolean mStatus;
+    GLenum mCondition;
+};
+
+}
+
+#endif // LIBGLESV2_RENDERER_FENCEIMPL_H_