Revert 107528 - Collect some histograms about signed binary downloads.

chrome/browser/safe_browsing/signature_util_posix.cc

Index: chrome/browser/safe_browsing/signature_util_posix.cc
===================================================================
--- chrome/browser/safe_browsing/signature_util_posix.cc	(revision 107537)
+++ chrome/browser/safe_browsing/signature_util_posix.cc	(working copy)
@@ -1,18 +0,0 @@
-// 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.
-//
-// This is a stub for the code signing utilities on Mac and Linux.
-// It should eventually be replaced with a real implementation.
-
-#include "chrome/browser/safe_browsing/signature_util.h"
-
-namespace safe_browsing {
-namespace signature_util {
-
-bool IsSigned(const FilePath& file_path) {
-  return false;
-}
-
-}  // namespace signature_util
-}  // namespace safe_browsing