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

base/files/file_path_watcher_browsertest.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/files/file_path_watcher.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <aclapi.h>
 #elif defined(OS_POSIX)
@@ skipping 120 matching lines @@
                         TestDelegateBase* delegate,
                         bool recursive_watch,
                         bool* result,
                         base::WaitableEvent* completion) {
   *result = watcher->Watch(target, recursive_watch,
                            base::Bind(&TestDelegateBase::OnFileChanged,
                                       delegate->AsWeakPtr()));
   completion->Signal();
 }
 
-void QuitLoopWatchCallback(MessageLoop* loop,
-                           const FilePath& expected_path,
-                           bool expected_error,
-                           bool* flag,
-                           const FilePath& path,
-                           bool error) {
-  ASSERT_TRUE(flag);
-  *flag = true;
-  EXPECT_EQ(expected_path, path);
-  EXPECT_EQ(expected_error, error);
-  loop->PostTask(FROM_HERE, loop->QuitWhenIdleClosure());
-}
-
 class FilePathWatcherTest : public testing::Test {
  public:
   FilePathWatcherTest()
       : file_thread_("FilePathWatcherTest") {}
 
   virtual ~FilePathWatcherTest() {}
 
  protected:
   virtual void SetUp() OVERRIDE {
     // Create a separate file thread in order to test proper thread usage.
@@ skipping 736 matching lines @@
   ASSERT_TRUE(ChangeFilePermissions(test_dir1, Execute, false));
   ASSERT_TRUE(WaitForEvents());
   ASSERT_TRUE(ChangeFilePermissions(test_dir1, Execute, true));
   DeleteDelegateOnFileThread(delegate.release());
 }
 
 #endif  // OS_MACOSX
 }  // namespace
 
 }  // namespace base