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

components/safe_browsing_db/prefix_set.h

 // 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.
 //
 // A read-only set implementation for |SBPrefix| items.  Prefixes are
 // sorted and stored as 16-bit deltas from the previous prefix.  An
 // index structure provides quick random access, and also handles
 // cases where 16 bits cannot encode a delta.
 //
 // For example, the sequence {20, 25, 41, 65432, 150000, 160000} would
@@ skipping 28 matching lines @@
 //
 // The on-disk format looks like:
 //         4 byte magic number
 //         4 byte version number
 //         4 byte |index_.size()|
 //         4 byte |deltas_.size()|
 //     n * 8 byte |&index_[0]..&index_[n]|
 //     m * 2 byte |&deltas_[0]..&deltas_[m]|
 //        16 byte digest
 
-#ifndef CHROME_BROWSER_SAFE_BROWSING_PREFIX_SET_H_
-#define CHROME_BROWSER_SAFE_BROWSING_PREFIX_SET_H_
+#ifndef COMPONENTS_SAFE_BROWSING_DB_PREFIX_SET_H_
+#define COMPONENTS_SAFE_BROWSING_DB_PREFIX_SET_H_
 
 #include <utility>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
+#include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
-#include "chrome/browser/safe_browsing/safe_browsing_util.h"
+#include "components/safe_browsing_db/safe_browsing_db_util.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace safe_browsing {
 
 class PrefixSet {
  public:
   ~PrefixSet();
@@ skipping 108 matching lines @@
 
   // Buffers prefixes until enough are avaliable to emit a run.
   std::vector<SBPrefix> buffer_;
 
   // The PrefixSet being built.
   scoped_ptr<PrefixSet> prefix_set_;
 };
 
 }  // namespace safe_browsing
 
-#endif  // CHROME_BROWSER_SAFE_BROWSING_PREFIX_SET_H_
+#endif  // COMPONENTS_SAFE_BROWSING_DB_PREFIX_SET_H_