Move prefix_set and parts of s_b_util into a new component safe_browsing_db.

chrome/browser/safe_browsing/safe_browsing_store_file.cc

 // Copyright (c) 2012 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/safe_browsing_store_file.h"
 
 #include "base/files/file_util.h"
 #include "base/files/scoped_file.h"
 #include "base/md5.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/sparse_histogram.h"
+#include "components/safe_browsing_db/prefix_set.h"
 
 namespace {
 
 // NOTE(shess): kFileMagic should not be a byte-wise palindrome, so
 // that byte-order changes force corruption.
 const int32 kFileMagic = 0x600D71FE;
 
 // Version history:
 // Version 6: aad08754/r2814 by erikkay@google.com on 2008-10-02 (sqlite)
 // Version 7: 6afe28a5/r37435 by shess@chromium.org on 2010-01-28
@@ skipping 1133 matching lines @@
   // With SQLite support gone, one way to get to this code is if the
   // existing file is a SQLite file.  Make sure the journal file is
   // also removed.
   const base::FilePath journal_filename(
       basename.value() + FILE_PATH_LITERAL("-journal"));
   if (base::PathExists(journal_filename))
     base::DeleteFile(journal_filename, false);
 
   return true;
 }