| Index: third_party/WebKit/public/platform/Platform.h
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| diff --git a/third_party/WebKit/public/platform/Platform.h b/third_party/WebKit/public/platform/Platform.h
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| index 747885a940b479fac6bcd5a2f069c40775d78f50..05422218d50f2a442d9c51c3d731b46c93f39e70 100644
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| --- a/third_party/WebKit/public/platform/Platform.h
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| +++ b/third_party/WebKit/public/platform/Platform.h
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| @@ -470,8 +470,13 @@ class BLINK_PLATFORM_EXPORT Platform {
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|    // GPU ----------------------------------------------------------------
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|    //
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|    struct ContextAttributes {
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| +    bool alpha = true;
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| +    bool depth = true;
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| +    bool stencil = false;
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| +    bool antialias = true;
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|      bool failIfMajorPerformanceCaveat = false;
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|      unsigned webGLVersion = 0;
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| +    bool ownOffscreenSurface = false;
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|    };
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|    struct GraphicsInfo {
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|      unsigned vendorId = 0;
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| 
 |