Revert 107528 - Collect some histograms about signed binary downloads.

chrome/browser/safe_browsing/signature_util_win.cc

-// Copyright (c) 2011 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 "chrome/browser/safe_browsing/signature_util.h"
-
-#include <windows.h>
-#include <wincrypt.h>
-#include "base/file_path.h"
-
-namespace safe_browsing {
-namespace signature_util {
-
-bool IsSigned(const FilePath& file_path) {
-  // Get message handle and store handle from the signed file.
-  BOOL result = CryptQueryObject(CERT_QUERY_OBJECT_FILE,
-                                 file_path.value().c_str(),
-                                 CERT_QUERY_CONTENT_FLAG_PKCS7_SIGNED_EMBED,
-                                 CERT_QUERY_FORMAT_FLAG_BINARY,
-                                 0,      // flags
-                                 NULL,   // encoding
-                                 NULL,   // content type
-                                 NULL,   // format type
-                                 NULL,   // HCERTSTORE
-                                 NULL,   // HCRYPTMSG
-                                 NULL);  // context
-  return result == TRUE;
-}
-
-}  // namespace signature_util
-}  // namespace safe_browsing