Remove alpha/depth/stencil/antialias from WGC3D::Attributes.

third_party/WebKit/Source/modules/webgl/WebGLContextAttributeHelpers.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "modules/webgl/WebGLContextAttributeHelpers.h"
 
 #include "core/frame/Settings.h"
 
 namespace blink {
 
 WebGLContextAttributes toWebGLContextAttributes(const CanvasContextCreationAttributes& attrs)
 {
     WebGLContextAttributes result;
     result.setAlpha(attrs.alpha());
     result.setDepth(attrs.depth());
     result.setStencil(attrs.stencil());
     result.setAntialias(attrs.antialias());
     result.setPremultipliedAlpha(attrs.premultipliedAlpha());
     result.setPreserveDrawingBuffer(attrs.preserveDrawingBuffer());
     result.setFailIfMajorPerformanceCaveat(attrs.failIfMajorPerformanceCaveat());
     return result;
 }
 
-WebGraphicsContext3D::Attributes toWebGraphicsContext3DAttributes(const WebGLContextAttributes& attrs, const WebString& topDocumentURL, Settings* settings, unsigned webGLVersion)
+WebGraphicsContext3D::Attributes toWebGraphicsContext3DAttributes(const WebGLContextAttributes& attrs, const WebString& topDocumentURL, unsigned webGLVersion)
 {
     WebGraphicsContext3D::Attributes result;
-    result.alpha = attrs.alpha();
-    result.depth = attrs.depth();
-    result.stencil = attrs.stencil();
-    result.antialias = attrs.antialias();
-    if (attrs.antialias()) {
-        if (settings && !settings->openGLMultisamplingEnabled())
-            result.antialias = false;
-    }
     result.failIfMajorPerformanceCaveat = attrs.failIfMajorPerformanceCaveat();
-
     result.shareResources = false;
     result.preferDiscreteGPU = true;
-
     result.topDocumentURL = topDocumentURL;
-
     result.webGLVersion = webGLVersion;
     return result;
 }
 
 } // namespace blink