sync: remove use of protobuf extensions in protocol to reduce static init overhead.

chrome/browser/sync/engine/verify_updates_command_unittest.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 "base/location.h"
 #include "chrome/browser/sync/engine/verify_updates_command.h"
 #include "chrome/browser/sync/protocol/bookmark_specifics.pb.h"
 #include "chrome/browser/sync/sessions/session_state.h"
 #include "chrome/browser/sync/sessions/sync_session.h"
 #include "chrome/browser/sync/syncable/syncable.h"
@@ skipping 33 matching lines @@
     WriteTransaction trans(FROM_HERE, UNITTEST, directory());
     MutableEntry entry(&trans, syncable::CREATE_NEW_UPDATE_ITEM,
         Id::CreateFromServerId(item_id));
     ASSERT_TRUE(entry.good());
 
     entry.Put(syncable::BASE_VERSION, 1);
     entry.Put(syncable::SERVER_VERSION, 1);
     entry.Put(syncable::NON_UNIQUE_NAME, item_id);
     entry.Put(syncable::PARENT_ID, Id::CreateFromServerId(parent_id));
     sync_pb::EntitySpecifics default_specifics;
-    AddDefaultExtensionValue(type, &default_specifics);
+    AddDefaultFieldValue(type, &default_specifics);
     entry.Put(syncable::SERVER_SPECIFICS, default_specifics);
   }
 
   void AddUpdate(GetUpdatesResponse* updates,
       const std::string& id, const std::string& parent,
       const syncable::ModelType& type) {
     sync_pb::SyncEntity* e = updates->add_entries();
     e->set_id_string("b1");
     e->set_parent_id_string(parent);
     e->set_non_unique_name("b1");
     e->set_name("b1");
-    AddDefaultExtensionValue(type, e->mutable_specifics());
+    AddDefaultFieldValue(type, e->mutable_specifics());
   }
 
   VerifyUpdatesCommand command_;
 
 };
 
 TEST_F(VerifyUpdatesCommandTest, AllVerified) {
   string root = syncable::GetNullId().GetServerId();
 
   CreateLocalItem("b1", root, syncable::BOOKMARKS);
@@ skipping 25 matching lines @@
     ASSERT_TRUE(status->update_progress());
     EXPECT_EQ(1, status->update_progress()->VerifiedUpdatesSize());
   }
   {
     sessions::ScopedModelSafeGroupRestriction r(status, GROUP_PASSIVE);
     EXPECT_FALSE(status->update_progress());
   }
 }
 
 }