Revert of base: Remove use of MessageLoopProxy

base/threading/sequenced_worker_pool.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 "base/threading/sequenced_worker_pool.h"
 
 #include <list>
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
 
 #include "base/atomic_sequence_num.h"
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/critical_closure.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/memory/linked_ptr.h"
+#include "base/message_loop/message_loop_proxy.h"
 #include "base/stl_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/synchronization/condition_variable.h"
 #include "base/synchronization/lock.h"
-#include "base/thread_task_runner_handle.h"
 #include "base/threading/platform_thread.h"
 #include "base/threading/simple_thread.h"
 #include "base/threading/thread_local.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time/time.h"
 #include "base/trace_event/trace_event.h"
 #include "base/tracked_objects.h"
 
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_nsautorelease_pool.h"
@@ skipping 1116 matching lines @@
   // Don't construct lazy instance on check.
   if (g_lazy_tls_ptr == NULL)
     return SequenceToken();
 
   SequencedWorkerPool::SequenceToken* token = g_lazy_tls_ptr.Get().Get();
   if (!token)
     return SequenceToken();
   return *token;
 }
 
-SequencedWorkerPool::SequencedWorkerPool(size_t max_threads,
-                                         const std::string& thread_name_prefix)
-    : constructor_task_runner_(ThreadTaskRunnerHandle::Get()),
+SequencedWorkerPool::SequencedWorkerPool(
+    size_t max_threads,
+    const std::string& thread_name_prefix)
+    : constructor_message_loop_(MessageLoopProxy::current()),
       inner_(new Inner(this, max_threads, thread_name_prefix, NULL)) {
 }
 
-SequencedWorkerPool::SequencedWorkerPool(size_t max_threads,
-                                         const std::string& thread_name_prefix,
-                                         TestingObserver* observer)
-    : constructor_task_runner_(ThreadTaskRunnerHandle::Get()),
+SequencedWorkerPool::SequencedWorkerPool(
+    size_t max_threads,
+    const std::string& thread_name_prefix,
+    TestingObserver* observer)
+    : constructor_message_loop_(MessageLoopProxy::current()),
       inner_(new Inner(this, max_threads, thread_name_prefix, observer)) {
 }
 
 SequencedWorkerPool::~SequencedWorkerPool() {}
 
 void SequencedWorkerPool::OnDestruct() const {
-  DCHECK(constructor_task_runner_);
+  DCHECK(constructor_message_loop_.get());
   // Avoid deleting ourselves on a worker thread (which would
   // deadlock).
   if (RunsTasksOnCurrentThread()) {
-    constructor_task_runner_->DeleteSoon(FROM_HERE, this);
+    constructor_message_loop_->DeleteSoon(FROM_HERE, this);
   } else {
     delete this;
   }
 }
 
 SequencedWorkerPool::SequenceToken SequencedWorkerPool::GetSequenceToken() {
   return inner_->GetSequenceToken();
 }
 
 SequencedWorkerPool::SequenceToken SequencedWorkerPool::GetNamedSequenceToken(
@@ skipping 99 matching lines @@
 
 void SequencedWorkerPool::FlushForTesting() {
   inner_->CleanupForTesting();
 }
 
 void SequencedWorkerPool::SignalHasWorkForTesting() {
   inner_->SignalHasWorkForTesting();
 }
 
 void SequencedWorkerPool::Shutdown(int max_new_blocking_tasks_after_shutdown) {
-  DCHECK(constructor_task_runner_->BelongsToCurrentThread());
+  DCHECK(constructor_message_loop_->BelongsToCurrentThread());
   inner_->Shutdown(max_new_blocking_tasks_after_shutdown);
 }
 
 bool SequencedWorkerPool::IsShutdownInProgress() {
   return inner_->IsShutdownInProgress();
 }
 
 }  // namespace base