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 3b99a2497d0fd76517671e6f479e04a0c6a1e7ce..0671537376641c324977fe36f313810d5e5960e8 100644
--- a/chrome/browser/net/crl_set_fetcher.cc
+++ b/chrome/browser/net/crl_set_fetcher.cc
@@ -172,9 +172,11 @@ 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,