Revert of content/common: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

content/common/host_discardable_shared_memory_manager.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 "content/common/host_discardable_shared_memory_manager.h"
 
 #include <algorithm>
 
 #include "base/atomic_sequence_num.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/debug/crash_logging.h"
 #include "base/lazy_instance.h"
 #include "base/memory/discardable_memory.h"
 #include "base/numerics/safe_math.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/sys_info.h"
-#include "base/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 
 namespace content {
 namespace {
 
 class DiscardableMemoryImpl : public base::DiscardableMemory {
  public:
   DiscardableMemoryImpl(scoped_ptr<base::DiscardableSharedMemory> shared_memory,
                         const base::Closure& deleted_callback)
       : shared_memory_(shared_memory.Pass()),
@@ skipping 354 matching lines @@
   return base::Time::Now();
 }
 
 void HostDiscardableSharedMemoryManager::ScheduleEnforceMemoryPolicy() {
   lock_.AssertAcquired();
 
   if (enforce_memory_policy_pending_)
     return;
 
   enforce_memory_policy_pending_ = true;
-  base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
+  base::MessageLoop::current()->PostDelayedTask(
       FROM_HERE,
       base::Bind(&HostDiscardableSharedMemoryManager::EnforceMemoryPolicy,
                  weak_ptr_factory_.GetWeakPtr()),
       base::TimeDelta::FromMilliseconds(kEnforceMemoryPolicyDelayMs));
 }
 
 }  // namespace content