Remove calls to MessageLoop::current() in components.

components/nacl/loader/nacl_listener.cc

Index: components/nacl/loader/nacl_listener.cc
diff --git a/components/nacl/loader/nacl_listener.cc b/components/nacl/loader/nacl_listener.cc
index 146b855f2e10ab64adb441de7b9c30779308a84c..66f967178fe7f22a84aba89258dcc6f483a11955 100644
--- a/components/nacl/loader/nacl_listener.cc
+++ b/components/nacl/loader/nacl_listener.cc
@@ -19,7 +19,9 @@
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/rand_util.h"
+#include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "components/nacl/common/nacl_messages.h"
 #include "components/nacl/common/nacl_renderer_messages.h"
@@ -165,7 +167,6 @@ NaClListener::NaClListener()
 #if defined(OS_POSIX)
       number_of_cores_(-1),  // unknown/error
 #endif
-      main_loop_(NULL),
       is_started_(false) {
   IPC::AttachmentBrokerUnprivileged::CreateBrokerIfNeeded();
   io_thread_.StartWithOptions(
@@ -181,8 +182,8 @@ NaClListener::~NaClListener() {
 }
 
 bool NaClListener::Send(IPC::Message* msg) {
-  DCHECK(main_loop_ != NULL);
-  if (base::MessageLoop::current() == main_loop_) {
+  DCHECK(!!main_task_runner_);
+  if (main_task_runner_->BelongsToCurrentThread()) {
     // This thread owns the channel.
     return channel_->Send(msg);
   } else {
@@ -231,7 +232,7 @@ void NaClListener::Listen() {
   if (global && !global->IsPrivilegedBroker())
     global->RegisterBrokerCommunicationChannel(channel_.get());
   channel_->Init(channel_name, IPC::Channel::MODE_CLIENT, true);
-  main_loop_ = base::MessageLoop::current();
+  main_task_runner_ = base::ThreadTaskRunnerHandle::Get();
   base::RunLoop().Run();
 }