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

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

 // Copyright 2014 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/fetch/Body.h"
 
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8ArrayBuffer.h"
 #include "bindings/core/v8/V8ThrowException.h"
 #include "core/dom/DOMArrayBuffer.h"
 #include "core/dom/DOMTypedArray.h"
+#include "core/dom/TaskRunnerHelper.h"
 #include "core/fileapi/Blob.h"
 #include "core/frame/UseCounter.h"
 #include "modules/fetch/BodyStreamBuffer.h"
 #include "modules/fetch/FetchDataLoader.h"
 #include "public/platform/WebDataConsumerHandle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 #include <memory>
 
 namespace blink {
 
 namespace {
 
 class BodyConsumerBase : public GarbageCollectedFinalized<BodyConsumerBase>, public FetchDataLoader::Client {
     WTF_MAKE_NONCOPYABLE(BodyConsumerBase);
     USING_GARBAGE_COLLECTED_MIXIN(BodyConsumerBase);
 public:
     explicit BodyConsumerBase(ScriptPromiseResolver* resolver) : m_resolver(resolver) {}
     ScriptPromiseResolver* resolver() { return m_resolver; }
     void didFetchDataLoadFailed() override
     {
         ScriptState::Scope scope(resolver()->getScriptState());
         m_resolver->reject(V8ThrowException::createTypeError(resolver()->getScriptState()->isolate(), "Failed to fetch"));
     }
 
+    WebTaskRunner* getTaskRunner() override
+    {
+        return TaskRunnerHelper::getUnthrottledTaskRunner(resolver()->getScriptState());
+    }
+
     DEFINE_INLINE_TRACE()
     {
         visitor->trace(m_resolver);
         FetchDataLoader::Client::trace(visitor);
     }
 
 private:
     Member<ScriptPromiseResolver> m_resolver;
 };
 
@@ skipping 173 matching lines @@
 Body::Body(ExecutionContext* context) : ActiveScriptWrappable(this) , ContextLifecycleObserver(context) {}
 
 ScriptPromise Body::rejectInvalidConsumption(ScriptState* scriptState)
 {
     if (isBodyLocked() || bodyUsed())
         return ScriptPromise::reject(scriptState, V8ThrowException::createTypeError(scriptState->isolate(), "Already read"));
     return ScriptPromise();
 }
 
 } // namespace blink