Use ParentFrameTaskRunners for encodeImageOnEncoderThread

third_party/WebKit/Source/core/workers/ParentFrameTaskRunners.cpp

 // Copyright 2016 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 "core/workers/ParentFrameTaskRunners.h"
 
 #include "core/dom/ContextLifecycleObserver.h"
 #include "core/dom/Document.h"
 #include "public/platform/Platform.h"
 #include "wtf/Assertions.h"
 #include "wtf/ThreadingPrimitives.h"
 
 namespace blink {
 
 ParentFrameTaskRunners::ParentFrameTaskRunners(LocalFrame* frame)
     : LocalFrameLifecycleObserver(frame)
 {
     if (frame)
         DCHECK(frame->document()->isContextThread());
 
     // For now we only support very limited task types.
-    for (auto type : { TaskType::Internal, TaskType::Networking, TaskType::PostedMessage }) {
+    for (auto type : { TaskType::Internal, TaskType::Networking, TaskType::PostedMessage, TaskType::CanvasBlobSerialization }) {
         m_taskRunners.add(type, TaskRunnerHelper::get(type, frame));
     }
 }
 
 WebTaskRunner* ParentFrameTaskRunners::get(TaskType type)
 {
     MutexLocker lock(m_taskRunnersMutex);
     return m_taskRunners.get(type);
 }
 
 DEFINE_TRACE(ParentFrameTaskRunners)
 {
     LocalFrameLifecycleObserver::trace(visitor);
 }
 
 void ParentFrameTaskRunners::contextDestroyed()
 {
     MutexLocker lock(m_taskRunnersMutex);
     for (auto& entry : m_taskRunners)
         entry.value = Platform::current()->currentThread()->getWebTaskRunner();
 }
 
 } // namespace blink