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

components/safe_browsing_db/prefix_set.h

Index: components/safe_browsing_db/prefix_set.h
diff --git a/chrome/browser/safe_browsing/prefix_set.h b/components/safe_browsing_db/prefix_set.h
similarity index 96%
rename from chrome/browser/safe_browsing/prefix_set.h
rename to components/safe_browsing_db/prefix_set.h
index 6efd21973ffbd5928a729755feef40059bc8e603..433da66c3c59593cd08eef86ae2daa115bb1ec5f 100644
--- a/chrome/browser/safe_browsing/prefix_set.h
+++ b/components/safe_browsing_db/prefix_set.h
@@ -46,15 +46,16 @@
 //     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;
@@ -183,4 +184,4 @@ class PrefixSetBuilder {
 
 }  // namespace safe_browsing
 
-#endif  // CHROME_BROWSER_SAFE_BROWSING_PREFIX_SET_H_
+#endif  // COMPONENTS_SAFE_BROWSING_DB_PREFIX_SET_H_