mac: Prepare most test code for -Wunused-functions too.

chrome/browser/sync/glue/sync_backend_registrar_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 "chrome/browser/sync/glue/sync_backend_registrar.h"
 
 #include "chrome/browser/sync/glue/change_processor_mock.h"
 #include "chrome/browser/sync/glue/ui_model_worker.h"
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/test/test_browser_thread.h"
@@ skipping 208 matching lines @@
   TriggerChanges(registrar_.get(), BOOKMARKS);
 
   registrar_->DeactivateDataType(BOOKMARKS);
   ExpectRoutingInfo(registrar_.get(), syncer::ModelSafeRoutingInfo());
   ExpectHasProcessorsForTypes(*registrar_, ModelTypeSet());
 
   // Should do nothing.
   TriggerChanges(registrar_.get(), BOOKMARKS);
 }
 
-void ActiviateDoneOnDb(base::WaitableEvent* done) {
-  done->Signal();
-}
-
 TEST_F(SyncBackendRegistrarTest, ActivateDeactivateNonUIDataType) {
   InSequence in_sequence;
   registrar_->SetInitialTypes(ModelTypeSet());
 
   // Should do nothing.
   TriggerChanges(registrar_.get(), AUTOFILL);
 
   StrictMock<ChangeProcessorMock> change_processor_mock;
   EXPECT_CALL(change_processor_mock, StartImpl(&profile_));
   EXPECT_CALL(change_processor_mock, IsRunning())
@@ skipping 23 matching lines @@
   ExpectRoutingInfo(registrar_.get(), syncer::ModelSafeRoutingInfo());
   ExpectHasProcessorsForTypes(*registrar_, ModelTypeSet());
 
   // Should do nothing.
   TriggerChanges(registrar_.get(), AUTOFILL);
 }
 
 }  // namespace
 
 }  // namespace browser_sync