Use ByteStream in downloads system to decouple source and sink.

content/browser/download/download_net_log_parameters.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 "content/browser/download/download_net_log_parameters.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/values.h"
@@ skipping 200 matching lines @@
   DictionaryValue* dict = new DictionaryValue();
 
   dict->SetString("file_name", file_name_);
   dict->SetString("start_offset", base::Int64ToString(start_offset_));
 
   return dict;
 }
 
 FileOpenedParameters::~FileOpenedParameters() {}
 
+FileStreamDrainedParameters::FileStreamDrainedParameters(
+    size_t stream_size, size_t num_buffers)
+    : stream_size_(stream_size), num_buffers_(num_buffers) {
+}
+
+Value* FileStreamDrainedParameters::ToValue() const {
+  DictionaryValue* dict = new DictionaryValue();
+
+  dict->SetInteger("stream_size", static_cast<int>(stream_size_));
+  dict->SetInteger("num_buffers", static_cast<int>(num_buffers_));
+
+  return dict;
+}
+
+FileStreamDrainedParameters::~FileStreamDrainedParameters() { }
+
 FileRenamedParameters::FileRenamedParameters(
     const std::string& old_filename, const std::string& new_filename)
         : old_filename_(old_filename), new_filename_(new_filename) {
 }
 
 Value* FileRenamedParameters::ToValue() const {
   DictionaryValue* dict = new DictionaryValue();
 
   dict->SetString("old_filename", old_filename_);
   dict->SetString("new_filename", new_filename_);
@@ skipping 13 matching lines @@
 
   dict->SetString("operation", operation_);
   dict->SetInteger("net_error", net_error_);
 
   return dict;
 }
 
 FileErrorParameters::~FileErrorParameters() {}
 
 }  // namespace download_net_logs