(WIP) Worker: Merge ParentFrameTaskRunners into TaskRunnerHelper

third_party/WebKit/Source/core/html/canvas/CanvasAsyncBlobCreator.cpp

Index: third_party/WebKit/Source/core/html/canvas/CanvasAsyncBlobCreator.cpp
diff --git a/third_party/WebKit/Source/core/html/canvas/CanvasAsyncBlobCreator.cpp b/third_party/WebKit/Source/core/html/canvas/CanvasAsyncBlobCreator.cpp
index 99d80457fbc82d9b94c6922e0466eafe9ec50180..f4456947681f133ad2376a7b1493d0763fcabb2f 100644
--- a/third_party/WebKit/Source/core/html/canvas/CanvasAsyncBlobCreator.cpp
+++ b/third_party/WebKit/Source/core/html/canvas/CanvasAsyncBlobCreator.cpp
@@ -203,9 +203,6 @@ CanvasAsyncBlobCreator::CanvasAsyncBlobCreator(DOMUint8ClampedArray* data,
   m_pixelRowStride = size.width() * NumChannelsPng;
   m_idleTaskStatus = IdleTaskNotSupported;
   m_numRowsCompleted = 0;
-  if (document) {
-    m_parentFrameTaskRunner = ParentFrameTaskRunners::create(document->frame());
-  }
   if (m_scriptPromiseResolver) {
     m_functionType = OffscreenCanvasToBlobPromise;
   } else {
@@ -220,7 +217,6 @@ void CanvasAsyncBlobCreator::dispose() {
   // resources while any remaining posted tasks are queued.
   m_data.clear();
   m_document.clear();
-  m_parentFrameTaskRunner.clear();
   m_callback.clear();
   m_scriptPromiseResolver.clear();
 }
@@ -492,7 +488,8 @@ void CanvasAsyncBlobCreator::encodeImageOnEncoderThread(double quality) {
 
   if (!ImageDataBuffer(m_size, m_data->data())
            .encodeImage("image/webp", quality, m_encodedImage.get())) {
-    m_parentFrameTaskRunner->get(TaskType::CanvasBlobSerialization)
+    FrameTaskRunnerHelper::get(TaskType::CanvasBlobSerialization,
+                               m_document.get())
         ->postTask(
             BLINK_FROM_HERE,
             crossThreadBind(&CanvasAsyncBlobCreator::createNullAndReturnResult,
@@ -500,7 +497,8 @@ void CanvasAsyncBlobCreator::encodeImageOnEncoderThread(double quality) {
     return;
   }
 
-  m_parentFrameTaskRunner->get(TaskType::CanvasBlobSerialization)
+  FrameTaskRunnerHelper::get(TaskType::CanvasBlobSerialization,
+                             m_document.get())
       ->postTask(
           BLINK_FROM_HERE,
           crossThreadBind(&CanvasAsyncBlobCreator::createBlobAndReturnResult,
@@ -618,7 +616,6 @@ DEFINE_TRACE(CanvasAsyncBlobCreator) {
   visitor->trace(m_document);
   visitor->trace(m_data);
   visitor->trace(m_callback);
-  visitor->trace(m_parentFrameTaskRunner);
   visitor->trace(m_scriptPromiseResolver);
 }