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diff --git a/gfx/angle/checkout/src/libANGLE/GLES1State.h b/gfx/angle/checkout/src/libANGLE/GLES1State.h
new file mode 100644
index 0000000000..e9c108b58b
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+++ b/gfx/angle/checkout/src/libANGLE/GLES1State.h
@@ -0,0 +1,351 @@
+//
+// Copyright 2018 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.
+//
+
+// GLES1State.h: Defines the GLES1State class holding the state of
+// a GLES1 context.
+
+#ifndef LIBANGLE_GLES1STATE_H_
+#define LIBANGLE_GLES1STATE_H_
+
+#include <unordered_set>
+
+#include "common/FixedVector.h"
+#include "common/angleutils.h"
+#include "common/bitset_utils.h"
+#include "common/matrix_utils.h"
+#include "common/vector_utils.h"
+#include "libANGLE/Caps.h"
+#include "libANGLE/angletypes.h"
+
+namespace gl
+{
+
+// State types specific to GLES1 contexts, from the OpenGL ES 1.1 spec "State Tables" section
+struct TextureCoordF
+{
+    TextureCoordF();
+    TextureCoordF(float _s, float _t, float _r, float _q);
+    bool operator==(const TextureCoordF &other) const;
+
+    GLfloat s = 0.0f;
+    GLfloat t = 0.0f;
+    GLfloat r = 0.0f;
+    GLfloat q = 0.0f;
+};
+
+struct MaterialParameters
+{
+    MaterialParameters();
+
+    ColorF ambient;
+    ColorF diffuse;
+    ColorF specular;
+    ColorF emissive;
+    GLfloat specularExponent;
+};
+
+struct LightModelParameters
+{
+    LightModelParameters();
+
+    ColorF color;
+    bool twoSided;
+};
+
+struct LightParameters
+{
+    LightParameters();
+    LightParameters(const LightParameters &other);
+
+    bool enabled                 = false;
+    ColorF ambient               = {0.0f, 0.0f, 0.0f, 1.0f};
+    ColorF diffuse               = {0.0f, 0.0f, 0.0f, 1.0f};
+    ColorF specular              = {0.0f, 0.0f, 0.0f, 1.0f};
+    angle::Vector4 position      = {0.0f, 0.0f, 1.0f, 0.0f};
+    angle::Vector3 direction     = {0.0f, 0.0f, -1.0f};
+    GLfloat spotlightExponent    = 0.0f;
+    GLfloat spotlightCutoffAngle = 180.0f;
+    GLfloat attenuationConst     = 1.0f;
+    GLfloat attenuationLinear    = 0.0f;
+    GLfloat attenuationQuadratic = 0.0f;
+};
+
+struct FogParameters
+{
+    FogParameters();
+
+    FogMode mode;
+    GLfloat density;
+    GLfloat start;
+    GLfloat end;
+    ColorF color;
+};
+
+struct TextureEnvironmentParameters
+{
+    TextureEnvironmentParameters();
+    TextureEnvironmentParameters(const TextureEnvironmentParameters &other);
+
+    TextureEnvMode mode         = TextureEnvMode::Modulate;
+    TextureCombine combineRgb   = TextureCombine::Modulate;
+    TextureCombine combineAlpha = TextureCombine::Modulate;
+
+    TextureSrc src0Rgb   = TextureSrc::Texture;
+    TextureSrc src0Alpha = TextureSrc::Texture;
+
+    TextureSrc src1Rgb   = TextureSrc::Previous;
+    TextureSrc src1Alpha = TextureSrc::Previous;
+
+    TextureSrc src2Rgb   = TextureSrc::Constant;
+    TextureSrc src2Alpha = TextureSrc::Constant;
+
+    TextureOp op0Rgb   = TextureOp::SrcColor;
+    TextureOp op0Alpha = TextureOp::SrcAlpha;
+
+    TextureOp op1Rgb   = TextureOp::SrcColor;
+    TextureOp op1Alpha = TextureOp::SrcAlpha;
+
+    TextureOp op2Rgb   = TextureOp::SrcAlpha;
+    TextureOp op2Alpha = TextureOp::SrcAlpha;
+
+    ColorF color       = {0.0f, 0.0f, 0.0f, 0.0f};
+    GLfloat rgbScale   = 1.0f;
+    GLfloat alphaScale = 1.0f;
+
+    bool pointSpriteCoordReplace = false;
+
+    auto tie() const
+    {
+        return std::tie(mode, combineRgb, combineAlpha, src0Rgb, src0Alpha, src1Rgb, src1Alpha,
+                        src2Rgb, src2Alpha, op0Rgb, op0Alpha, op1Rgb, op1Alpha, op2Rgb, op2Alpha,
+                        color, rgbScale, alphaScale, pointSpriteCoordReplace);
+    }
+};
+
+bool operator==(const TextureEnvironmentParameters &a, const TextureEnvironmentParameters &b);
+bool operator!=(const TextureEnvironmentParameters &a, const TextureEnvironmentParameters &b);
+
+struct PointParameters
+{
+    PointParameters();
+    PointParameters(const PointParameters &other);
+
+    GLfloat pointSizeMin                    = 0.0f;
+    GLfloat pointSizeMax                    = 1.0f;
+    GLfloat pointFadeThresholdSize          = 1.0f;
+    angle::Vector3 pointDistanceAttenuation = {1.0f, 0.0f, 0.0f};
+    GLfloat pointSize                       = 1.0f;
+};
+
+struct ClipPlaneParameters
+{
+    ClipPlaneParameters();
+    ClipPlaneParameters(bool enabled, const angle::Vector4 &equation);
+    ClipPlaneParameters(const ClipPlaneParameters &other);
+    ClipPlaneParameters &operator=(const ClipPlaneParameters &other);
+
+    bool enabled;
+    angle::Vector4 equation;
+};
+
+class Context;
+class GLES1Renderer;
+class State;
+
+class GLES1State final : angle::NonCopyable
+{
+  public:
+    GLES1State();
+    ~GLES1State();
+
+    void initialize(const Context *context, const State *state);
+
+    void setAlphaFunc(AlphaTestFunc func, GLfloat ref);
+    void setClientTextureUnit(unsigned int unit);
+    unsigned int getClientTextureUnit() const;
+
+    void setCurrentColor(const ColorF &color);
+    const ColorF &getCurrentColor() const;
+
+    void setCurrentNormal(const angle::Vector3 &normal);
+    const angle::Vector3 &getCurrentNormal() const;
+
+    void setCurrentTextureCoords(unsigned int unit, const TextureCoordF &coords);
+    const TextureCoordF &getCurrentTextureCoords(unsigned int unit) const;
+
+    void setMatrixMode(MatrixType mode);
+    MatrixType getMatrixMode() const;
+
+    GLint getCurrentMatrixStackDepth(GLenum param) const;
+
+    void pushMatrix();
+    void popMatrix();
+
+    using MatrixStack = angle::FixedVector<angle::Mat4, Caps::GlobalMatrixStackDepth>;
+    MatrixStack &currentMatrixStack();
+    const MatrixStack &currentMatrixStack() const;
+    const MatrixStack &getMatrixStack(MatrixType mode) const;
+
+    const angle::Mat4 &getModelviewMatrix() const;
+
+    void loadMatrix(const angle::Mat4 &m);
+    void multMatrix(const angle::Mat4 &m);
+
+    void setLogicOpEnabled(bool enabled);
+    void setLogicOp(LogicalOperation opcodePacked);
+
+    void setClientStateEnabled(ClientVertexArrayType clientState, bool enable);
+    void setTexCoordArrayEnabled(unsigned int unit, bool enable);
+    bool isClientStateEnabled(ClientVertexArrayType clientState) const;
+    bool isTexCoordArrayEnabled(unsigned int unit) const;
+    bool isTextureTargetEnabled(unsigned int unit, const TextureType type) const;
+
+    LightModelParameters &lightModelParameters();
+    const LightModelParameters &lightModelParameters() const;
+
+    LightParameters &lightParameters(unsigned int light);
+    const LightParameters &lightParameters(unsigned int light) const;
+
+    MaterialParameters &materialParameters();
+    const MaterialParameters &materialParameters() const;
+    bool isColorMaterialEnabled() const;
+
+    void setShadeModel(ShadingModel model);
+
+    void setClipPlane(unsigned int plane, const GLfloat *equation);
+    void getClipPlane(unsigned int plane, GLfloat *equation) const;
+
+    FogParameters &fogParameters();
+    const FogParameters &fogParameters() const;
+
+    TextureEnvironmentParameters &textureEnvironment(unsigned int unit);
+    const TextureEnvironmentParameters &textureEnvironment(unsigned int unit) const;
+
+    PointParameters &pointParameters();
+    const PointParameters &pointParameters() const;
+
+    AttributesMask getVertexArraysAttributeMask() const;
+    AttributesMask getActiveAttributesMask() const;
+
+    bool shouldHandleDirtyProgram();
+
+    void setHint(GLenum target, GLenum mode);
+    GLenum getHint(GLenum target) const;
+
+    enum DirtyGles1Type
+    {
+        DIRTY_GLES1_TEXTURE_UNIT_ENABLE = 0,
+        DIRTY_GLES1_CLIENT_STATE_ENABLE,
+        DIRTY_GLES1_FEATURE_ENABLE,
+        DIRTY_GLES1_CURRENT_VECTOR,
+        DIRTY_GLES1_CLIENT_ACTIVE_TEXTURE,
+        DIRTY_GLES1_MATRICES,
+        DIRTY_GLES1_TEXTURE_ENVIRONMENT,
+        DIRTY_GLES1_MATERIAL,
+        DIRTY_GLES1_LIGHTS,
+        DIRTY_GLES1_FOG,
+        DIRTY_GLES1_SHADE_MODEL,
+        DIRTY_GLES1_POINT_PARAMETERS,
+        DIRTY_GLES1_ALPHA_TEST,
+        DIRTY_GLES1_LOGIC_OP,
+        DIRTY_GLES1_CLIP_PLANES,
+        DIRTY_GLES1_HINT_SETTING,
+        DIRTY_GLES1_PROGRAM,
+        DIRTY_GLES1_MAX,
+    };
+
+    void setAllDirty() { mDirtyBits.set(); }
+
+  private:
+    friend class State;
+    friend class GLES1Renderer;
+
+    // Back pointer for reading from State.
+    const State *mGLState;
+
+    using DirtyBits = angle::BitSet<DIRTY_GLES1_MAX>;
+    DirtyBits mDirtyBits;
+
+    void setDirty(DirtyGles1Type type) { mDirtyBits.set(type); }
+    void clearDirty() { mDirtyBits.reset(); }
+    void clearDirtyBits(const DirtyGles1Type &bitset) { mDirtyBits &= ~bitset; }
+    bool isDirty(DirtyGles1Type type) const { return mDirtyBits.test(type); }
+
+    // All initial state values come from the
+    // OpenGL ES 1.1 spec.
+    std::vector<angle::PackedEnumBitSet<TextureType>> mTexUnitEnables;
+
+    // Table 6.4, 6.5 (IsEnabled)
+    bool mVertexArrayEnabled;
+    bool mNormalArrayEnabled;
+    bool mColorArrayEnabled;
+    bool mPointSizeArrayEnabled;
+    std::vector<bool> mTexCoordArrayEnabled;
+
+    // Table 6.7-6.16 (IsEnabled)
+    bool mLineSmoothEnabled;
+    bool mPointSmoothEnabled;
+    bool mPointSpriteEnabled;
+    bool mAlphaTestEnabled;
+    bool mLogicOpEnabled;
+    bool mLightingEnabled;
+    bool mFogEnabled;
+    bool mRescaleNormalEnabled;
+    bool mNormalizeEnabled;
+    bool mColorMaterialEnabled;
+    bool mReflectionMapEnabled;
+
+    // Table 6.3
+    ColorF mCurrentColor;
+    angle::Vector3 mCurrentNormal;
+    // Invariant: mCurrentTextureCoords size is == GL_MAX_TEXTURE_UNITS.
+    std::vector<TextureCoordF> mCurrentTextureCoords;
+
+    // Table 6.4
+    unsigned int mClientActiveTexture;
+
+    // Table 6.7
+    MatrixType mMatrixMode;
+    MatrixStack mProjectionMatrices;
+    MatrixStack mModelviewMatrices;
+    std::vector<MatrixStack> mTextureMatrices;
+
+    // Table 6.15
+    using TextureEnvironments = std::vector<TextureEnvironmentParameters>;
+    TextureEnvironments mTextureEnvironments;
+
+    // Table 6.9, 2.8
+    MaterialParameters mMaterial;
+    LightModelParameters mLightModel;
+
+    // Table 6.10
+    std::vector<LightParameters> mLights;
+
+    // Table 6.8
+    FogParameters mFog;
+    ShadingModel mShadeModel;
+
+    // Table 6.11
+    PointParameters mPointParameters;
+
+    // Table 6.16
+    AlphaTestFunc mAlphaTestFunc;
+    GLfloat mAlphaTestRef;
+    LogicalOperation mLogicOp;
+
+    // Table 6.7
+    std::vector<ClipPlaneParameters> mClipPlanes;
+
+    // Table 6.19
+    HintSetting mLineSmoothHint;
+    HintSetting mPointSmoothHint;
+    HintSetting mPerspectiveCorrectionHint;
+    HintSetting mFogHint;
+};
+
+}  // namespace gl
+
+#endif  // LIBANGLE_GLES1STATE_H_