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

third_party/WebKit/Source/modules/fetch/CompositeDataConsumerHandle.h

 // 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.
 
 #ifndef CompositeDataConsumerHandle_h
 #define CompositeDataConsumerHandle_h
 
 #include "modules/ModulesExport.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebDataConsumerHandle.h"
@@ skipping 38 matching lines @@
     static std::unique_ptr<WebDataConsumerHandle> create(std::unique_ptr<WebDataConsumerHandle> handle, T* updater)
     {
         DCHECK(handle);
         Updater* u = nullptr;
         std::unique_ptr<CompositeDataConsumerHandle> p = wrapUnique(new CompositeDataConsumerHandle(std::move(handle), &u));
         *updater = u;
         return std::move(p);
     }
     ~CompositeDataConsumerHandle() override;
 
-    std::unique_ptr<Reader> obtainReader(Client*) override;
+    std::unique_ptr<Reader> obtainReader(Client*, std::unique_ptr<WebTaskRunner> readerTaskRunner) override;
 
 private:
     class ReaderImpl;
 
     const char* debugName() const override { return "CompositeDataConsumerHandle"; }
 
     CompositeDataConsumerHandle(std::unique_ptr<WebDataConsumerHandle>, Updater**);
 
     RefPtr<Context> m_context;
 };
 
 } // namespace blink
 
 #endif // CompositeDataConsumerHandle_h