[Sync] Move GenerateSyncableHash to base.

components/sync/syncable/syncable_util.cc

Index: components/sync/syncable/syncable_util.cc
diff --git a/components/sync/syncable/syncable_util.cc b/components/sync/syncable/syncable_util.cc
index ea5198aac3aea1be86936f8545c81076b5ab82f6..7ed0bc9a9822a77c98b872540e104ceabc38043a 100644
--- a/components/sync/syncable/syncable_util.cc
+++ b/components/sync/syncable/syncable_util.cc
@@ -4,10 +4,8 @@
 
 #include "components/sync/syncable/syncable_util.h"
 
-#include "base/base64.h"
 #include "base/location.h"
 #include "base/logging.h"
-#include "base/sha1.h"
 #include "components/sync/syncable/directory.h"
 #include "components/sync/syncable/entry.h"
 #include "components/sync/syncable/mutable_entry.h"
@@ -92,27 +90,5 @@ bool SyncAssert(bool condition,
   return true;
 }
 
-std::string GenerateSyncableHash(ModelType model_type,
-                                 const std::string& client_tag) {
-  // Blank PB with just the field in it has termination symbol,
-  // handy for delimiter.
-  sync_pb::EntitySpecifics serialized_type;
-  AddDefaultFieldValue(model_type, &serialized_type);
-  std::string hash_input;
-  serialized_type.AppendToString(&hash_input);
-  hash_input.append(client_tag);
-
-  std::string encode_output;
-  base::Base64Encode(base::SHA1HashString(hash_input), &encode_output);
-  return encode_output;
-}
-
-std::string GenerateSyncableBookmarkHash(
-    const std::string& originator_cache_guid,
-    const std::string& originator_client_item_id) {
-  return syncable::GenerateSyncableHash(
-      BOOKMARKS, originator_cache_guid + originator_client_item_id);
-}
-
 }  // namespace syncable
 }  // namespace syncer