Clean up a few more unused globals.

content/browser/power_save_blocker_mac.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 "content/browser/power_save_blocker_impl.h"
 
 #include <IOKit/pwr_mgt/IOPMLib.h>
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/thread.h"
 
 namespace content {
 namespace {
 
 // Power management cannot be done on the UI thread. IOPMAssertionCreate does a
 // synchronous MIG call to configd, so if it is called on the main thread the UI
 // is at the mercy of another process. See http://crbug.com/79559 and
 // http://www.opensource.apple.com/source/IOKitUser/IOKitUser-514.16.31/pwr_mgt.subproj/IOPMLibPrivate.c .
 struct PowerSaveBlockerLazyInstanceTraits {
   static const bool kRegisterOnExit = false;
+#ifndef NDEBUG
   static const bool kAllowedToAccessOnNonjoinableThread = true;
+#endif
 
   static base::Thread* New(void* instance) {
     base::Thread* thread = new (instance) base::Thread("PowerSaveBlocker");
     thread->Start();
     return thread;
   }
   static void Delete(base::Thread* instance) { }
 };
 base::LazyInstance<base::Thread, PowerSaveBlockerLazyInstanceTraits>
     g_power_thread = LAZY_INSTANCE_INITIALIZER;
@@ skipping 67 matching lines @@
       base::Bind(&Delegate::ApplyBlock, delegate_));
 }
 
 PowerSaveBlockerImpl::~PowerSaveBlockerImpl() {
   g_power_thread.Pointer()->message_loop()->PostTask(
       FROM_HERE,
       base::Bind(&Delegate::RemoveBlock, delegate_));
 }
 
 }  // namespace content