Clean up the unpack directory for CRLSet component.

chrome/browser/net/crl_set_fetcher.cc

Index: chrome/browser/net/crl_set_fetcher.cc
diff --git a/chrome/browser/net/crl_set_fetcher.cc b/chrome/browser/net/crl_set_fetcher.cc
index f56053f80a75cf763da34397551df544eb450794..1a2bfbaefc8f6ba8ad51d7b5269577c546c28c51 100644
--- a/chrome/browser/net/crl_set_fetcher.cc
+++ b/chrome/browser/net/crl_set_fetcher.cc
@@ -168,9 +168,11 @@ void CRLSetFetcher::OnUpdateError(int error) {
 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);
+  return result;
 }
 
 bool CRLSetFetcher::DoInstall(const base::DictionaryValue& manifest,