Use per-frame TaskRunner instead of thread's default in DataConsumerHandle

third_party/WebKit/Source/modules/fetch/BodyStreamBuffer.cpp

Index: third_party/WebKit/Source/modules/fetch/BodyStreamBuffer.cpp
diff --git a/third_party/WebKit/Source/modules/fetch/BodyStreamBuffer.cpp b/third_party/WebKit/Source/modules/fetch/BodyStreamBuffer.cpp
index ea9bebed928461031340a6baa041b9e68de1e88c..485ccbb1319d8d231bee18c7082258d8ccb9e4e4 100644
--- a/third_party/WebKit/Source/modules/fetch/BodyStreamBuffer.cpp
+++ b/third_party/WebKit/Source/modules/fetch/BodyStreamBuffer.cpp
@@ -10,6 +10,7 @@
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/dom/DOMTypedArray.h"
 #include "core/dom/ExceptionCode.h"
+#include "core/dom/TaskRunnerHelper.h"
 #include "core/streams/ReadableStreamController.h"
 #include "core/streams/ReadableStreamOperations.h"
 #include "core/workers/WorkerGlobalScope.h"
@@ -80,6 +81,11 @@ public:
         m_client->didFetchDataLoadFailed();
     }
 
+    WebTaskRunner* getTaskRunner() override
+    {
+        return m_client->getTaskRunner();
+    }
+
     DEFINE_INLINE_TRACE()
     {
         visitor->trace(m_buffer);
@@ -296,6 +302,11 @@ void BodyStreamBuffer::didGetReadable()
     processData();
 }
 
+WebTaskRunner* BodyStreamBuffer::getTaskRunner()
+{
+    return TaskRunnerHelper::getUnthrottledTaskRunner(scriptState());
+}
+
 bool BodyStreamBuffer::hasPendingActivity() const
 {
     if (m_loader)