Use STLClearObject in URLFetcherCore

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 179 matching lines @@
   if (!is_chunked_upload_) {
     AssertHasNoUploadData();
     DCHECK(upload_content_type_.empty());
   }
 
   // Empty |content_type| is not allowed here, because it is impossible
   // to ensure non-empty upload content as it is not yet supplied.
   DCHECK(!content_type.empty());
 
   upload_content_type_ = content_type;
-  upload_content_.clear();
+  base::STLClearObject(&upload_content_);
   is_chunked_upload_ = true;
 }
 
 void URLFetcherCore::AppendChunkToUpload(const std::string& content,
                                          bool is_last_chunk) {
   DCHECK(delegate_task_runner_);
   DCHECK(network_task_runner_.get());
   DCHECK(is_chunked_upload_);
   network_task_runner_->PostTask(
       FROM_HERE,
@@ skipping 744 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