[Sync] Move GenerateSyncableHash to base.

components/sync/syncable/directory_backing_store.cc

Index: components/sync/syncable/directory_backing_store.cc
diff --git a/components/sync/syncable/directory_backing_store.cc b/components/sync/syncable/directory_backing_store.cc
index 580d7e61484d10060f13266cbc6de207fce2ca1e..07867bb76398edac24d937535f53cffd7c5d250d 100644
--- a/components/sync/syncable/directory_backing_store.cc
+++ b/components/sync/syncable/directory_backing_store.cc
@@ -22,13 +22,13 @@
 #include "base/time/time.h"
 #include "base/trace_event/trace_event.h"
 #include "build/build_config.h"
+#include "components/sync/base/hash_util.h"
 #include "components/sync/base/node_ordinal.h"
 #include "components/sync/base/time.h"
 #include "components/sync/protocol/bookmark_specifics.pb.h"
 #include "components/sync/protocol/sync.pb.h"
 #include "components/sync/syncable/syncable_columns.h"
 #include "components/sync/syncable/syncable_id.h"
-#include "components/sync/syncable/syncable_util.h"
 #include "sql/error_delegate_util.h"
 #include "sql/transaction.h"
 
@@ -1384,9 +1384,8 @@ bool DirectoryBackingStore::MigrateVersion85To86() {
         // means we can set the bookmark tag according to the originator client
         // item ID and originator cache guid, because (unlike the other case) we
         // know that this client is the originator.
-        unique_bookmark_tag = syncable::GenerateSyncableBookmarkHash(
-            cache_guid,
-            id_string.substr(1));
+        unique_bookmark_tag =
+            GenerateSyncableBookmarkHash(cache_guid, id_string.substr(1));
       } else {
         // If we've already committed the item, then we don't know who the
         // originator was.  We do not have access to the originator client item
@@ -1400,7 +1399,7 @@ bool DirectoryBackingStore::MigrateVersion85To86() {
         // tag according to the originator_cache_guid and originator_item_id
         // when we see updates for this item.  That should ensure that commonly
         // modified items will end up with the proper tag values eventually.
-        unique_bookmark_tag = syncable::GenerateSyncableBookmarkHash(
+        unique_bookmark_tag = GenerateSyncableBookmarkHash(
             std::string(),  // cache_guid left intentionally blank.
             id_string.substr(1));
       }