Make URLFetcherCore::ReleaseRequest() release |buffer_|.

net/url_request/url_fetcher_core.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_fetcher_core.h"
 
 #include <stdint.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 64 matching lines @@
                                const GURL& original_url,
                                URLFetcher::RequestType request_type,
                                URLFetcherDelegate* d)
     : fetcher_(fetcher),
       original_url_(original_url),
       request_type_(request_type),
       delegate_(d),
       delegate_task_runner_(base::SequencedTaskRunnerHandle::Get()),
       load_flags_(LOAD_NORMAL),
       response_code_(URLFetcher::RESPONSE_CODE_INVALID),
-      buffer_(new IOBuffer(kBufferSize)),
       url_request_data_key_(NULL),
       was_fetched_via_proxy_(false),
       was_cached_(false),
       received_response_content_length_(0),
       total_received_bytes_(0),
       upload_content_set_(false),
       upload_range_offset_(0),
       upload_range_length_(0),
       referrer_policy_(
           URLRequest::CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE),
@@ skipping 325 matching lines @@
 
   if (net_error == OK) {
     response_code_ = request_->GetResponseCode();
     response_headers_ = request_->response_headers();
     socket_address_ = request_->GetSocketAddress();
     was_fetched_via_proxy_ = request_->was_fetched_via_proxy();
     was_cached_ = request_->was_cached();
     total_response_bytes_ = request_->GetExpectedContentSize();
   }
 
+  DCHECK(!buffer_);
+  if (request_type_ != URLFetcher::HEAD)
+    buffer_ = new IOBuffer(kBufferSize);
   ReadResponse();
 }
 
 void URLFetcherCore::OnCertificateRequested(
     URLRequest* request,
     SSLCertRequestInfo* cert_request_info) {
   DCHECK_EQ(request, request_.get());
   DCHECK(network_task_runner_->BelongsToCurrentThread());
 
   if (g_ignore_certificate_requests) {
@@ skipping 368 matching lines @@
   CancelURLRequest(result);
   delegate_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&URLFetcherCore::InformDelegateFetchIsComplete, this));
 }
 
 void URLFetcherCore::ReleaseRequest() {
   request_context_getter_->RemoveObserver(this);
   upload_progress_checker_timer_.reset();
   request_.reset();
+  buffer_ = nullptr;
   g_registry.Get().RemoveURLFetcherCore(this);
 }
 
 base::TimeTicks URLFetcherCore::GetBackoffReleaseTime() {
   DCHECK(network_task_runner_->BelongsToCurrentThread());
 
   if (!original_url_throttler_entry_.get())
     return base::TimeTicks();
 
   base::TimeTicks original_url_backoff =
@@ skipping 123 matching lines @@
 }
 
 void URLFetcherCore::AssertHasNoUploadData() const {
   DCHECK(!upload_content_set_);
   DCHECK(upload_content_.empty());
   DCHECK(upload_file_path_.empty());
   DCHECK(upload_stream_factory_.is_null());
 }
 
 }  // namespace net