Delete some unused code found by -Wunused-function

chrome/browser/sync/glue/sync_backend_host_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_host.h"
 
 #include <cstddef>
 
 #include "base/location.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 28 matching lines @@
 using ::testing::_;
 
 namespace browser_sync {
 
 namespace {
 
 ACTION_P(Signal, event) {
   event->Signal();
 }
 
-void SignalEvent(base::WaitableEvent* event) {
-  event->Signal();
-}
-
-static void QuitMessageLoop() {
+void QuitMessageLoop() {
   MessageLoop::current()->Quit();
 }
 
 class MockSyncFrontend : public SyncFrontend {
  public:
   virtual ~MockSyncFrontend() {}
 
   MOCK_METHOD1(OnInvalidatorStateChange,
                void(syncer::InvalidatorState));
   MOCK_METHOD2(OnIncomingInvalidation,
@@ skipping 564 matching lines @@
   backend_->Shutdown(false);
   backend_.reset();
 
   TearDown();
   SetUp();
 }
 
 }  // namespace
 
 }  // namespace browser_sync