Move BinaryFeatureExtractor and PEImageReader to common.

chrome/browser/safe_browsing/binary_feature_extractor_posix.cc

-// Copyright 2014 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/binary_feature_extractor.h"
-
-namespace safe_browsing {
-
-BinaryFeatureExtractor::BinaryFeatureExtractor() {}
-
-BinaryFeatureExtractor::~BinaryFeatureExtractor() {}
-
-void BinaryFeatureExtractor::CheckSignature(
-    const base::FilePath& file_path,
-    ClientDownloadRequest_SignatureInfo* signature_info) {}
-
-bool BinaryFeatureExtractor::ExtractImageHeaders(
-    const base::FilePath& file_path,
-    ExtractHeadersOption options,
-    ClientDownloadRequest_ImageHeaders* image_headers) {
-  return false;
-}
-
-}  // namespace safe_browsing