Revert "Reland: URLRequestJob: change ReadRawData contract"

net/url_request/url_request_simple_job.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/url_request/url_request_simple_job.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 47 matching lines @@
   return true;
 }
 
 bool URLRequestSimpleJob::GetCharset(std::string* charset) {
   *charset = charset_;
   return true;
 }
 
 URLRequestSimpleJob::~URLRequestSimpleJob() {}
 
-int URLRequestSimpleJob::ReadRawData(IOBuffer* buf, int buf_size) {
-  buf_size = std::min(static_cast<int64>(buf_size),
-                      byte_range_.last_byte_position() - next_data_offset_ + 1);
-  if (buf_size == 0)
-    return 0;
+bool URLRequestSimpleJob::ReadRawData(IOBuffer* buf,
+                                      int buf_size,
+                                      int* bytes_read) {
+  DCHECK(bytes_read);
+  buf_size = static_cast<int>(
+      std::min(static_cast<int64>(buf_size),
+               byte_range_.last_byte_position() - next_data_offset_ + 1));
+  DCHECK_GE(buf_size, 0);
+  if (buf_size == 0) {
+    *bytes_read = 0;
+    return true;
+  }
 
   // Do memory copy on a background thread. See crbug.com/422489.
   GetTaskRunner()->PostTaskAndReply(
       FROM_HERE, base::Bind(&CopyData, make_scoped_refptr(buf), buf_size, data_,
                             next_data_offset_),
-      base::Bind(&URLRequestSimpleJob::ReadRawDataComplete,
+      base::Bind(&URLRequestSimpleJob::OnReadCompleted,
                  weak_factory_.GetWeakPtr(), buf_size));
   next_data_offset_ += buf_size;
-  return ERR_IO_PENDING;
+  SetStatus(URLRequestStatus(URLRequestStatus::IO_PENDING, 0));
+  return false;
+}
+
+void URLRequestSimpleJob::OnReadCompleted(int bytes_read) {
+  SetStatus(URLRequestStatus());
+  NotifyReadComplete(bytes_read);
 }
 
 base::TaskRunner* URLRequestSimpleJob::GetTaskRunner() const {
   return task_runner_.get();
 }
 
 int URLRequestSimpleJob::GetData(std::string* mime_type,
                                  std::string* charset,
                                  std::string* data,
                                  const CompletionCallback& callback) const {
@@ skipping 10 matching lines @@
   int result = GetData(mime_type, charset, &str_data->data(), callback);
   *data = str_data;
   return result;
 }
 
 void URLRequestSimpleJob::StartAsync() {
   if (!request_)
     return;
 
   if (ranges().size() > 1) {
-    NotifyStartError(URLRequestStatus(URLRequestStatus::FAILED,
-                                      ERR_REQUEST_RANGE_NOT_SATISFIABLE));
+    NotifyDone(URLRequestStatus(URLRequestStatus::FAILED,
+                                ERR_REQUEST_RANGE_NOT_SATISFIABLE));
     return;
   }
 
   if (!ranges().empty() && range_parse_result() == OK)
     byte_range_ = ranges().front();
 
   const int result =
       GetRefCountedData(&mime_type_, &charset_, &data_,
                         base::Bind(&URLRequestSimpleJob::OnGetDataCompleted,
                                    weak_factory_.GetWeakPtr()));
 
   if (result != ERR_IO_PENDING)
     OnGetDataCompleted(result);
 }
 
 void URLRequestSimpleJob::OnGetDataCompleted(int result) {
   if (result == OK) {
     // Notify that the headers are complete
     if (!byte_range_.ComputeBounds(data_->size())) {
-      NotifyStartError(URLRequestStatus(URLRequestStatus::FAILED,
-                                        ERR_REQUEST_RANGE_NOT_SATISFIABLE));
+      NotifyDone(URLRequestStatus(URLRequestStatus::FAILED,
+                                  ERR_REQUEST_RANGE_NOT_SATISFIABLE));
       return;
     }
 
     next_data_offset_ = byte_range_.first_byte_position();
     set_expected_content_size(byte_range_.last_byte_position() -
                               next_data_offset_ + 1);
     NotifyHeadersComplete();
   } else {
     NotifyStartError(URLRequestStatus(URLRequestStatus::FAILED, result));
   }
 }
 
 }  // namespace net