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

chrome/browser/sync/engine/verify_updates_command_unittest.cc

Index: chrome/browser/sync/engine/verify_updates_command_unittest.cc
diff --git a/chrome/browser/sync/engine/verify_updates_command_unittest.cc b/chrome/browser/sync/engine/verify_updates_command_unittest.cc
index d3f20a4b8a798c8eecd49bb2f750626c303e3723..b207e6f048c7ba5676ee5b0a74c0cd951d6966f9 100644
--- a/chrome/browser/sync/engine/verify_updates_command_unittest.cc
+++ b/chrome/browser/sync/engine/verify_updates_command_unittest.cc
@@ -51,7 +51,7 @@ class VerifyUpdatesCommandTest : public SyncerCommandTest {
     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);
   }
 
@@ -63,7 +63,7 @@ class VerifyUpdatesCommandTest : public SyncerCommandTest {
     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_;