Add WorkerSettings to expose certain flag values in WorkerGlobalScope

third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.h

Index: third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.h
diff --git a/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.h b/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.h
index 6fef3c0133ff7fe4e6e0de290554e46b8fe690c5..c5d3059f06c48f5a9fe6e19c407c75cb8e93434f 100644
--- a/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.h
+++ b/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.h
@@ -24,7 +24,7 @@ public:
 
         CanvasRenderingContext* create(ScriptState* scriptState, OffscreenCanvas* canvas, const CanvasContextCreationAttributes& attrs) override
         {
-            return new OffscreenCanvasRenderingContext2D(canvas, attrs);
+            return new OffscreenCanvasRenderingContext2D(scriptState, canvas, attrs);
         }
 
         CanvasRenderingContext::ContextType getContextType() const override
@@ -75,13 +75,14 @@ public:
     ImageBitmap* transferToImageBitmap(ExceptionState&) final;
 
 protected:
-    OffscreenCanvasRenderingContext2D(OffscreenCanvas*, const CanvasContextCreationAttributes& attrs);
+    OffscreenCanvasRenderingContext2D(ScriptState*, OffscreenCanvas*, const CanvasContextCreationAttributes& attrs);
     DECLARE_VIRTUAL_TRACE();
 
 private:
     bool m_hasAlpha;
     bool m_needsMatrixClipRestore = false;
     std::unique_ptr<ImageBuffer> m_imageBuffer;
+    bool m_disableReadingFromCanvas;
 };
 
 } // namespace blink