Scheduler: Deprecate CancellableTaskFactory in favor of WebTaskRunner::postCancellableTask (3)

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"
@@ skipping 10 matching lines @@
 }
 
 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()),
-      m_cancellableTaskFactory(CancellableTaskFactory::create(
-          this,
-          &WebGLQuery::allowAvailabilityUpdate)) {
+                       ->clone()) {
   GLuint query;
   ctx->contextGL()->GenQueriesEXT(1, &query);
   setObject(query);
 }
 
 void WebGLQuery::setTarget(GLenum target) {
   ASSERT(object());
   ASSERT(!m_target);
   m_target = target;
 }
@@ skipping 25 matching lines @@
 
   // We can only update the cached result when control returns to the browser.
   m_canUpdateAvailability = false;
   GLuint available = 0;
   gl->GetQueryObjectuivEXT(object(), GL_QUERY_RESULT_AVAILABLE_EXT, &available);
   m_queryResultAvailable = !!available;
   if (m_queryResultAvailable) {
     GLuint result = 0;
     gl->GetQueryObjectuivEXT(object(), GL_QUERY_RESULT_EXT, &result);
     m_queryResult = result;
-    m_cancellableTaskFactory->cancel();
+    m_taskHandle.cancel();
   } else {
     scheduleAllowAvailabilityUpdate();
   }
 }
 
 bool WebGLQuery::isQueryResultAvailable() {
   return m_queryResultAvailable;
 }
 
 GLuint WebGLQuery::getQueryResult() {
   return m_queryResult;
 }
 
 void WebGLQuery::scheduleAllowAvailabilityUpdate() {
-  if (!m_cancellableTaskFactory->isPending())
-    m_taskRunner->postTask(BLINK_FROM_HERE,
-                           m_cancellableTaskFactory->cancelAndCreate());
+  if (m_taskHandle.isActive())
+    return;
+  m_taskHandle = m_taskRunner->postCancellableTask(
+      BLINK_FROM_HERE, WTF::bind(&WebGLQuery::allowAvailabilityUpdate,
+                                 wrapWeakPersistent(this)));
 }
 
 void WebGLQuery::allowAvailabilityUpdate() {
   m_canUpdateAvailability = true;
 }
 
 }  // namespace blink