net: Make UploadDataStream::Init() asynchronous.

net/base/upload_bytes_element_reader.cc

 // Copyright (c) 2012 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 "net/base/upload_bytes_element_reader.h"
 
 #include "base/logging.h"
 #include "net/base/net_errors.h"
 
 namespace net {
 
 UploadBytesElementReader::UploadBytesElementReader(const char* bytes,
                                                    int bytes_length)
     : bytes_(bytes),
       bytes_length_(bytes_length),
       offset_(0) {
 }
 
 UploadBytesElementReader::~UploadBytesElementReader() {
 }
 
+int UploadBytesElementReader::Init(const CompletionCallback& callback) {
+  return OK;
+}
+
 int UploadBytesElementReader::InitSync() {
   return OK;
 }
 
 uint64 UploadBytesElementReader::GetContentLength() const {
   return bytes_length_;
 }
 
 uint64 UploadBytesElementReader::BytesRemaining() const {
   return bytes_length_ - offset_;
@@ skipping 13 matching lines @@
 
   offset_ += num_bytes_to_read;
   return num_bytes_to_read;
 }
 
 bool UploadBytesElementReader::IsInMemory() const {
   return true;
 }
 
 }  // namespace net