Delete some unused code found by -Wunused-function

chrome/browser/extensions/settings/settings_sync_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 "testing/gtest/include/gtest/gtest.h"
 
 #include "base/bind.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 176 matching lines @@
 
  private:
   // SettingsStorageFactory is refcounted.
   virtual ~TestingValueStoreFactory() {}
 
   // None of these storage areas are owned by this factory, so care must be
   // taken when calling GetExisting.
   std::map<std::string, TestingValueStore*> created_;
 };
 
-void AssignSettingsService(syncer::SyncableService** dst,
-                           const SettingsFrontend* frontend,
-                           syncer::ModelType type) {
-  *dst = frontend->GetBackendForSync(type);
-}
-
 }  // namespace
 
 class ExtensionSettingsSyncTest : public testing::Test {
  public:
   ExtensionSettingsSyncTest()
       : ui_thread_(BrowserThread::UI, MessageLoop::current()),
         file_thread_(BrowserThread::FILE, MessageLoop::current()),
         storage_factory_(new util::ScopedSettingsStorageFactory()),
         sync_processor_(new MockSyncChangeProcessor),
         sync_processor_delegate_(new SyncChangeProcessorDelegate(
@@ skipping 1206 matching lines @@
     ASSERT_EQ(1u, sync_processor_->changes().size());
     SettingSyncData sync_data = sync_processor_->changes()[0];
     EXPECT_EQ(syncer::SyncChange::ACTION_ADD, sync_data.change_type());
     EXPECT_EQ("ext", sync_data.extension_id());
     EXPECT_EQ("key.with.spot", sync_data.key());
     EXPECT_TRUE(sync_data.value().Equals(string_value.get()));
   }
 }
 
 }  // namespace extensions