Make OffscreenCanvas WebGL(2) context consider taintedness of image source

third_party/WebKit/Source/core/html/canvas/CanvasRenderingContext.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 190 matching lines @@
     return 0;
   }
 
   // ImageBitmap-specific interface
   virtual bool Paint(GraphicsContext&, const IntRect&) { return false; }
 
   // OffscreenCanvas-specific methods
   OffscreenCanvas* offscreenCanvas() const { return offscreen_canvas_; }
   virtual ImageBitmap* TransferToImageBitmap(ScriptState*) { return nullptr; }
 
-  bool WouldTaintOrigin(CanvasImageSource*, SecurityOrigin* = nullptr);
+  bool WouldTaintOrigin(CanvasImageSource*, SecurityOrigin*);
   void DidMoveToNewDocument(Document*);
 
   void DetachCanvas() { canvas_ = nullptr; }
   void DetachOffscreenCanvas() { offscreen_canvas_ = nullptr; }
 
   const CanvasContextCreationAttributes& CreationAttributes() const {
     return creation_attributes_;
   }
 
  protected:
@@ skipping 13 matching lines @@
   CanvasColorSpace color_space_;
   CanvasPixelFormat pixel_format_;
   bool linear_pixel_math_ = false;
   CanvasContextCreationAttributes creation_attributes_;
   bool finalize_frame_scheduled_ = false;
 };
 
 }  // namespace blink
 
 #endif