Add unknown file size handling in ComplexFormDataBytesConsumer

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

 // 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.
 
 #ifndef FormDataBytesConsumer_h
 #define FormDataBytesConsumer_h
 
 #include "modules/ModulesExport.h"
 #include "modules/fetch/BytesConsumer.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
+#include "wtf/Functional.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
 
 class DOMArrayBuffer;
 class DOMArrayBufferView;
 class EncodedFormData;
 
 class FormDataBytesConsumer final : public BytesConsumer {
  public:
+  using BytesConsumerFactory =
+      Function<BytesConsumer*(ExecutionContext*, PassRefPtr<BlobDataHandle>)>;
+
   explicit MODULES_EXPORT FormDataBytesConsumer(const String&);
   explicit MODULES_EXPORT FormDataBytesConsumer(DOMArrayBuffer*);
   explicit MODULES_EXPORT FormDataBytesConsumer(DOMArrayBufferView*);
   MODULES_EXPORT FormDataBytesConsumer(const void* data, size_t);
   MODULES_EXPORT FormDataBytesConsumer(ExecutionContext*,
                                        PassRefPtr<EncodedFormData>);
   MODULES_EXPORT static FormDataBytesConsumer* createForTesting(
       ExecutionContext* executionContext,
       PassRefPtr<EncodedFormData> formData,
-      BytesConsumer* consumer) {
+      std::unique_ptr<BytesConsumerFactory> factory) {
     return new FormDataBytesConsumer(executionContext, std::move(formData),
-                                     consumer);
+                                     std::move(factory));
   }
 
   // BytesConsumer implementation
   Result beginRead(const char** buffer, size_t* available) override {
     return m_impl->beginRead(buffer, available);
   }
   Result endRead(size_t readSize) override { return m_impl->endRead(readSize); }
   PassRefPtr<BlobDataHandle> drainAsBlobDataHandle(
       BlobSizePolicy policy) override {
     return m_impl->drainAsBlobDataHandle(policy);
@@ skipping 13 matching lines @@
   String debugName() const override { return m_impl->debugName(); }
 
   DEFINE_INLINE_TRACE() {
     visitor->trace(m_impl);
     BytesConsumer::trace(visitor);
   }
 
  private:
   MODULES_EXPORT FormDataBytesConsumer(ExecutionContext*,
                                        PassRefPtr<EncodedFormData>,
-                                       BytesConsumer*);
+                                       std::unique_ptr<BytesConsumerFactory>);
 
   const Member<BytesConsumer> m_impl;
 };
 
 }  // namespace blink
 
 #endif  // FormDataBytesConsumer_h