[WebGL-blink] Add test function to force fail the webgl-context

Source/core/html/canvas/WebGLRenderingContext.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 17 matching lines @@
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/html/canvas/WebGLRenderingContextBase.h"
 
 namespace blink {
 
 class WebGLRenderingContext final : public WebGLRenderingContextBase, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static PassOwnPtrWillBeRawPtr<WebGLRenderingContext> create(HTMLCanvasElement*, WebGLContextAttributes*);
+    static void forceNextWebGLContextCreationToFail();
     virtual ~WebGLRenderingContext();
 
     virtual unsigned version() const override { return 1; }
     virtual String contextName() const override { return "WebGLRenderingContext"; }
     virtual void registerContextExtensions() override;
 
     virtual void trace(Visitor*) override;
 
 private:
     WebGLRenderingContext(HTMLCanvasElement*, PassOwnPtr<blink::WebGraphicsContext3D>, WebGLContextAttributes*);
@@ skipping 23 matching lines @@
     RefPtrWillBeMember<WebGLDepthTexture> m_webglDepthTexture;
 };
 
 DEFINE_TYPE_CASTS(WebGLRenderingContext, CanvasRenderingContext, context,
     context->is3d() && WebGLRenderingContextBase::getWebGLVersion(context) == 1,
     context.is3d() && WebGLRenderingContextBase::getWebGLVersion(&context) == 1);
 
 } // namespace blink
 
 #endif // WebGLRenderingContext_h