mac: Prepare for -Wunused-functions.

chrome/browser/policy/browser_policy_connector.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/policy/browser_policy_connector.h"
 
 #include <algorithm>
 #include <iterator>
 
 #include "base/bind.h"
@@ skipping 90 matching lines @@
     "https://m.google.com/devicemanagement/data/api";
 
 #if defined(OS_CHROMEOS)
 // Install attributes for tests.
 EnterpriseInstallAttributes* g_testing_install_attributes = NULL;
 #endif  // defined(OS_CHROMEOS)
 
 // Used in BrowserPolicyConnector::SetPolicyProviderForTesting.
 ConfigurationPolicyProvider* g_testing_provider = NULL;
 
+#if defined(OS_CHROMEOS)
 // Helper that returns a new SequencedTaskRunner backed by the blocking pool.
 // Each SequencedTaskRunner returned is independent from the others.
 scoped_refptr<base::SequencedTaskRunner> GetBackgroundTaskRunner() {
   base::SequencedWorkerPool* pool = BrowserThread::GetBlockingPool();
   CHECK(pool);
   return pool->GetSequencedTaskRunnerWithShutdownBehavior(
       pool->GetSequenceToken(), base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
 }
+#endif  // defined(OS_CHROMEOS)
 
 #if defined(OS_MACOSX) && !defined(OS_IOS)
 base::FilePath GetManagedPolicyPath() {
   // This constructs the path to the plist file in which Mac OS X stores the
   // managed preference for the application. This is undocumented and therefore
   // fragile, but if it doesn't work out, AsyncPolicyLoader has a task that
   // polls periodically in order to reload managed preferences later even if we
   // missed the change.
   base::FilePath path;
   if (!PathService::Get(chrome::DIR_MANAGED_PREFS, &path))
@@ skipping 482 matching lines @@
     return new AsyncPolicyProvider(loader.Pass());
   } else {
     return NULL;
   }
 #else
   return NULL;
 #endif
 }
 
 }  // namespace policy