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diff --git a/gfx/angle/checkout/src/libANGLE/Device.h b/gfx/angle/checkout/src/libANGLE/Device.h
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+//
+// Copyright 2015 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.
+//
+
+// Device.h: Implements the egl::Device class, representing the abstract
+// device. Implements EGLDevice.
+
+#ifndef LIBANGLE_DEVICE_H_
+#define LIBANGLE_DEVICE_H_
+
+#include "common/angleutils.h"
+#include "libANGLE/Display.h"
+#include "libANGLE/Error.h"
+
+#include <memory>
+
+namespace rx
+{
+class DeviceImpl;
+} // namespace rx
+
+namespace egl
+{
+class Device final : public LabeledObject, angle::NonCopyable
+{
+ public:
+ Device(Display *owningDisplay, rx::DeviceImpl *impl);
+ ~Device() override;
+
+ void setLabel(EGLLabelKHR label) override;
+ EGLLabelKHR getLabel() const override;
+
+ Error getAttribute(EGLint attribute, EGLAttrib *value);
+ Display *getOwningDisplay() const { return mOwningDisplay; }
+ EGLint getType() const;
+
+ const DeviceExtensions &getExtensions() const;
+ const std::string &getExtensionString() const;
+
+ rx::DeviceImpl *getImplementation() { return mImplementation.get(); }
+
+ static egl::Error CreateDevice(EGLint deviceType, void *nativeDevice, Device **outDevice);
+ static bool IsValidDevice(const Device *device);
+
+ private:
+ void initDeviceExtensions();
+
+ EGLLabelKHR mLabel;
+
+ Display *mOwningDisplay;
+ std::unique_ptr<rx::DeviceImpl> mImplementation;
+
+ DeviceExtensions mDeviceExtensions;
+ std::string mDeviceExtensionString;
+};
+} // namespace egl
+
+#endif // LIBANGLE_DEVICE_H_