Remove task.h and finish base::Bind() migration.

chrome/browser/mac/keystone_glue.mm

 // Copyright (c) 2011 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.
 
 #import "chrome/browser/mac/keystone_glue.h"
 
 #include <sys/param.h>
 #include <sys/mount.h>
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_nsautorelease_pool.h"
 #include "base/mac/scoped_nsexception_enabler.h"
 #include "base/memory/ref_counted.h"
 #include "base/sys_string_conversions.h"
-#include "base/task.h"
 #include "base/threading/worker_pool.h"
 #include "chrome/browser/mac/authorization_util.h"
 #import "chrome/browser/mac/keystone_registration.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_version_info.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/l10n/l10n_util_mac.h"
 
@@ skipping 952 matching lines @@
   return [KeystoneGlue defaultKeystoneGlue] != nil;
 }
 
 string16 CurrentlyInstalledVersion() {
   KeystoneGlue* keystoneGlue = [KeystoneGlue defaultKeystoneGlue];
   NSString* version = [keystoneGlue currentlyInstalledVersion];
   return base::SysNSStringToUTF16(version);
 }
 
 }  // namespace keystone_glue