Replace MessageLoop::current()->task_runner() with ThreadTaskRunnerHandle::Get().

ipc/ipc_channel_reader.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 "ipc/ipc_channel_reader.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
+#include "base/logging.h"
 #include "base/message_loop/message_loop.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_logging.h"
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_message_attachment_set.h"
 #include "ipc/ipc_message_macros.h"
 
 namespace IPC {
 namespace internal {
 
 #ifdef IPC_MESSAGE_LOG_ENABLED
@@ skipping 293 matching lines @@
     blocked_ids_.erase(it);
 
   if (blocked_ids_.empty()) {
     StopObservingAttachmentBroker();
     DispatchMessages();
   }
 }
 
 void ChannelReader::StartObservingAttachmentBroker() {
 #if USE_ATTACHMENT_BROKER
-  GetAttachmentBroker()->AddObserver(
-      this, base::MessageLoopForIO::current()->task_runner());
+  DCHECK(base::MessageLoopForIO::IsCurrent());
+  GetAttachmentBroker()->AddObserver(this, base::ThreadTaskRunnerHandle::Get());
 #endif  // USE_ATTACHMENT_BROKER
 }
 
 void ChannelReader::StopObservingAttachmentBroker() {
 #if USE_ATTACHMENT_BROKER
   GetAttachmentBroker()->RemoveObserver(this);
 #endif  // USE_ATTACHMENT_BROKER
 }
 
 bool ChannelReader::CheckMessageSize(size_t size) {
   if (size <= Channel::kMaximumMessageSize) {
     return true;
   }
   input_overflow_buf_.clear();
   LOG(ERROR) << "IPC message is too big: " << size;
   return false;
 }
 
 }  // namespace internal
 }  // namespace IPC