Remove use of deprecated MessageLoop methods in components.

components/browsing_data/conditional_cache_deletion_helper.cc

 // Copyright 2016 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 "components/browsing_data/conditional_cache_deletion_helper.h"
 
 #include "base/callback.h"
+#include "base/location.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace {
 
 bool EntryPredicateFromURLsAndTime(
     const base::Callback<bool(const GURL&)>& url_predicate,
     const base::Time& begin_time,
     const base::Time& end_time,
     const disk_cache::Entry* entry) {
   return (entry->GetLastModified() >= begin_time &&
@@ skipping 53 matching lines @@
         previous_entry_->Doom();
       previous_entry_->Close();
     }
 
     if (error == net::ERR_FAILED) {
       // The iteration finished successfuly or we can no longer iterate
       // (e.g. the cache was destroyed). We cannot distinguish between the two,
       // but we know that there is nothing more that we can do, so we return OK.
       base::MessageLoop::current()->task_runner()->PostTask(
           FROM_HERE, base::Bind(completion_callback_, net::OK));
-      base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
+      base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
       return;
     }
 
     previous_entry_ = current_entry_;
     error = iterator_->OpenNextEntry(
         &current_entry_,
         base::Bind(&ConditionalCacheDeletionHelper::IterateOverEntries,
                    base::Unretained(this)));
   }
 }
 
 }  // namespace browsing_data