Implement offscreenCanvas.getContext('webgl') on a worker thread

components/test_runner/test_plugin.cc

 // Copyright 2013 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 "components/test_runner/test_plugin.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 167 matching lines @@
   DCHECK_EQ(this, container->plugin());
 
   container_ = container;
 
   blink::Platform::ContextAttributes attrs;
   attrs.webGLVersion = 1;  // We are creating a context through the WebGL APIs.
   blink::WebURL url = container->document().url();
   blink::Platform::GraphicsInfo gl_info;
   context_provider_ = base::WrapUnique(
       blink::Platform::current()->createOffscreenGraphicsContext3DProvider(
-          attrs, url, nullptr, &gl_info));
+          attrs, url, nullptr, &gl_info, blink::Platform::BindToCurrentThread));
   gl_ = context_provider_ ? context_provider_->contextGL() : nullptr;
 
   if (!InitScene())
     return false;
 
   layer_ = cc::TextureLayer::CreateForMailbox(this);
   web_layer_ = base::WrapUnique(new cc_blink::WebLayerImpl(layer_));
   container_->setWebLayer(web_layer_.get());
   if (re_request_touch_events_) {
     container_->requestTouchEventType(
@@ skipping 531 matching lines @@
   return kPluginPersistsMimeType;
 }
 
 bool TestPlugin::IsSupportedMimeType(const blink::WebString& mime_type) {
   return mime_type == TestPlugin::MimeType() ||
          mime_type == PluginPersistsMimeType() ||
          mime_type == CanCreateWithoutRendererMimeType();
 }
 
 }  // namespace test_runner