Remove calls to deprecated MessageLoop methods in chrome.

chrome/utility/image_writer/disk_unmounter_mac.cc

 // Copyright 2014 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/utility/image_writer/disk_unmounter_mac.h"
 
+#include <IOKit/storage/IOStorageProtocolCharacteristics.h>
 #include <sys/socket.h>
-#include <IOKit/storage/IOStorageProtocolCharacteristics.h>
 
 #include "base/message_loop/message_pump_mac.h"
 #include "base/posix/eintr_wrapper.h"
+#include "base/single_thread_task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "chrome/utility/image_writer/error_messages.h"
 #include "chrome/utility/image_writer/image_writer.h"
 
 namespace image_writer {
 
 DiskUnmounterMac::DiskUnmounterMac() : cf_thread_("ImageWriterDiskArb") {
   base::Thread::Options options;
   options.message_pump_factory = base::Bind(&CreateMessagePump);
 
   cf_thread_.StartWithOptions(options);
 }
 
 DiskUnmounterMac::~DiskUnmounterMac() {
   if (disk_)
     DADiskUnclaim(disk_);
 }
 
 void DiskUnmounterMac::Unmount(const std::string& device_path,
                                const base::Closure& success_continuation,
                                const base::Closure& failure_continuation) {
   // Should only be used once.
   DCHECK(!original_thread_.get());
   original_thread_ = base::ThreadTaskRunnerHandle::Get();
   success_continuation_ = success_continuation;
   failure_continuation_ = failure_continuation;
 
-  cf_thread_.message_loop()->PostTask(
-      FROM_HERE,
-      base::Bind(&DiskUnmounterMac::UnmountOnWorker,
-                 base::Unretained(this),
-                 device_path));
+  cf_thread_.task_runner()->PostTask(
+      FROM_HERE, base::Bind(&DiskUnmounterMac::UnmountOnWorker,
+                            base::Unretained(this), device_path));
 }
 
 // static
 void DiskUnmounterMac::DiskClaimed(DADiskRef disk,
                                    DADissenterRef dissenter,
                                    void* context) {
   DiskUnmounterMac* disk_unmounter = static_cast<DiskUnmounterMac*>(context);
 
   if (dissenter) {
     LOG(ERROR) << "Unable to claim disk.";
@@ skipping 62 matching lines @@
               this,
               DiskClaimed,
               this);
 }
 
 void DiskUnmounterMac::Error() {
   original_thread_->PostTask(FROM_HERE, failure_continuation_);
 }
 
 }  // namespace image_writer