Clean up the unpack directory for CRLSet component.

ios/chrome/browser/net/crl_set_fetcher.cc

 // Copyright 2015 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 "ios/chrome/browser/net/crl_set_fetcher.h"
 
 #include <stdint.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 145 matching lines @@
 }
 
 void CRLSetFetcher::OnUpdateError(int error) {
   LOG(WARNING) << "CRLSetFetcher got error " << error
                << " from component installer";
 }
 
 update_client::CrxInstaller::Result CRLSetFetcher::Install(
     const base::DictionaryValue& manifest,
     const base::FilePath& unpack_path) {
-  return update_client::InstallFunctionWrapper(
+  const auto result = update_client::InstallFunctionWrapper(
       base::Bind(&CRLSetFetcher::DoInstall, base::Unretained(this),
                  base::ConstRef(manifest), base::ConstRef(unpack_path)));
+  base::DeleteFile(unpack_path, true /* recursive */);
+  return result;
 }
 
 bool CRLSetFetcher::DoInstall(const base::DictionaryValue& manifest,
                               const base::FilePath& unpack_path) {
   base::FilePath crl_set_file_path =
       unpack_path.Append(FILE_PATH_LITERAL("crl-set"));
   base::FilePath save_to = GetCRLSetFilePath();
 
   std::string crl_set_bytes;
   if (!base::ReadFileToString(crl_set_file_path, &crl_set_bytes)) {
@@ skipping 59 matching lines @@
 bool CRLSetFetcher::GetInstalledFile(const std::string& file,
                                      base::FilePath* installed_file) {
   return false;
 }
 
 bool CRLSetFetcher::Uninstall() {
   return false;
 }
 
 CRLSetFetcher::~CRLSetFetcher() {}