Make WebTaskRunner ThreadSafeRefCounted

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

 // Copyright 2015 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/WebGLQuery.h"
 
 #include "core/dom/TaskRunnerHelper.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "modules/webgl/WebGL2RenderingContextBase.h"
 #include "public/platform/Platform.h"
 
 namespace blink {
 
 WebGLQuery* WebGLQuery::create(WebGL2RenderingContextBase* ctx) {
   return new WebGLQuery(ctx);
 }
 
 WebGLQuery::WebGLQuery(WebGL2RenderingContextBase* ctx)
     : WebGLSharedPlatform3DObject(ctx),
       m_target(0),
       m_canUpdateAvailability(false),
       m_queryResultAvailable(false),
       m_queryResult(0),
       m_taskRunner(TaskRunnerHelper::get(TaskType::Unthrottled,
-                                         &ctx->canvas()->document())
-                       ->clone()) {
+                                         &ctx->canvas()->document())) {
   GLuint query;
   ctx->contextGL()->GenQueriesEXT(1, &query);
   setObject(query);
 }
 
 WebGLQuery::~WebGLQuery() {
   runDestructor();
 }
 
 void WebGLQuery::setTarget(GLenum target) {
@@ skipping 56 matching lines @@
   m_taskHandle = m_taskRunner->postCancellableTask(
       BLINK_FROM_HERE, WTF::bind(&WebGLQuery::allowAvailabilityUpdate,
                                  wrapWeakPersistent(this)));
 }
 
 void WebGLQuery::allowAvailabilityUpdate() {
   m_canUpdateAvailability = true;
 }
 
 }  // namespace blink