Coverity: Fix leaking UCharsetDetector in ftp code.

webkit/glue/ftp_directory_listing_response_delegate.cc

 // Copyright (c) 2009 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 "webkit/glue/ftp_directory_listing_response_delegate.h"
 
 #include <vector>
 
 #include "base/i18n/icu_string_conversions.h"
 #include "base/logging.h"
@@ skipping 20 matching lines @@
 // can be other use cases.
 std::string DetectEncoding(const std::string& text) {
   if (IsStringASCII(text))
     return std::string();
   UErrorCode status = U_ZERO_ERROR;
   UCharsetDetector* detector = ucsdet_open(&status);
   ucsdet_setText(detector, text.data(), static_cast<int32_t>(text.length()),
                  &status);
   const UCharsetMatch* match = ucsdet_detect(detector, &status);
   const char* encoding = ucsdet_getName(match, &status);
+  ucsdet_close(detector);
   // Should we check the quality of the match? A rather arbitrary number is
   // assigned by ICU and it's hard to come up with a lower limit.
   if (U_FAILURE(status))
     return std::string();
   return encoding;
 }
 
 string16 RawByteSequenceToFilename(const char* raw_filename,
                                    const std::string& encoding) {
   if (encoding.empty())
@@ skipping 198 matching lines @@
 
 void FtpDirectoryListingResponseDelegate::SendResponseBufferToClient() {
   if (!response_buffer_.empty()) {
     client_->didReceiveData(loader_, response_buffer_.data(),
                             response_buffer_.length());
     response_buffer_.clear();
   }
 }
 
 }  // namespace webkit_glue