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diff --git a/gfx/angle/checkout/src/libANGLE/Stream.h b/gfx/angle/checkout/src/libANGLE/Stream.h
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+//
+// Copyright 2016 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.
+//
+
+// Stream.h: Defines the egl::Stream class, representing the stream
+// where frames are streamed in. Implements EGLStreanKHR.
+
+#ifndef LIBANGLE_STREAM_H_
+#define LIBANGLE_STREAM_H_
+
+#include <array>
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+
+#include "common/angleutils.h"
+#include "libANGLE/AttributeMap.h"
+#include "libANGLE/Debug.h"
+
+namespace rx
+{
+class StreamProducerImpl;
+}
+
+namespace gl
+{
+class Context;
+class Texture;
+} // namespace gl
+
+namespace egl
+{
+class Display;
+class Error;
+class Thread;
+
+class Stream final : public LabeledObject, angle::NonCopyable
+{
+ public:
+ Stream(Display *display, const AttributeMap &attribs);
+ ~Stream() override;
+
+ void setLabel(EGLLabelKHR label) override;
+ EGLLabelKHR getLabel() const override;
+
+ enum class ConsumerType
+ {
+ NoConsumer,
+ GLTextureRGB,
+ GLTextureYUV,
+ };
+
+ enum class ProducerType
+ {
+ NoProducer,
+ D3D11Texture,
+ };
+
+ // A GL texture interpretation of a part of a producer frame. For use with GL texture consumers
+ struct GLTextureDescription
+ {
+ unsigned int width;
+ unsigned int height;
+ unsigned int internalFormat;
+ unsigned int mipLevels;
+ };
+
+ EGLenum getState() const;
+
+ void setConsumerLatency(EGLint latency);
+ EGLint getConsumerLatency() const;
+
+ EGLuint64KHR getProducerFrame() const;
+ EGLuint64KHR getConsumerFrame() const;
+
+ void setConsumerAcquireTimeout(EGLint timeout);
+ EGLint getConsumerAcquireTimeout() const;
+
+ ConsumerType getConsumerType() const;
+ ProducerType getProducerType() const;
+
+ EGLint getPlaneCount() const;
+
+ rx::StreamProducerImpl *getImplementation();
+
+ // Consumer creation methods
+ Error createConsumerGLTextureExternal(const AttributeMap &attributes, gl::Context *context);
+
+ // Producer creation methods
+ Error createProducerD3D11Texture(const AttributeMap &attributes);
+
+ // Consumer methods
+ Error consumerAcquire(const gl::Context *context);
+ Error consumerRelease(const gl::Context *context);
+
+ // Some consumers are bound to GL contexts. This validates that a given context is bound to the
+ // stream's consumer
+ bool isConsumerBoundToContext(const gl::Context *context) const;
+
+ // Producer methods
+ Error validateD3D11Texture(const void *texture, const AttributeMap &attributes) const;
+ Error postD3D11Texture(void *texture, const AttributeMap &attributes);
+
+ private:
+ EGLLabelKHR mLabel;
+
+ // Associated display
+ Display *mDisplay;
+
+ // Producer Implementation
+ rx::StreamProducerImpl *mProducerImplementation;
+
+ // Associated GL context. Note that this is a weak pointer used for validation purposes only,
+ // and should never be arbitrarily dereferenced without knowing the context still exists as it
+ // can become dangling at any time.
+ gl::Context *mContext;
+
+ // EGL defined attributes
+ EGLint mState;
+ EGLuint64KHR mProducerFrame;
+ EGLuint64KHR mConsumerFrame;
+ EGLint mConsumerLatency;
+
+ // EGL gltexture consumer attributes
+ EGLint mConsumerAcquireTimeout;
+
+ // EGL gltexture yuv consumer attributes
+ EGLint mPlaneCount;
+ struct PlaneTexture
+ {
+ EGLint textureUnit;
+ gl::Texture *texture;
+ };
+ // Texture units and textures for all the planes
+ std::array<PlaneTexture, 3> mPlanes;
+
+ // Consumer and producer types
+ ConsumerType mConsumerType;
+ ProducerType mProducerType;
+
+ // ANGLE-only method, used internally
+ friend class gl::Texture;
+ void releaseTextures();
+};
+} // namespace egl
+
+#endif // LIBANGLE_STREAM_H_