Make nesting/running states a RunLoop rather than a MessageLoop concept.

device/bluetooth/test/test_bluetooth_adapter_observer.cc

 // Copyright 2015 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 "device/bluetooth/test/test_bluetooth_adapter_observer.h"
 
 #include <string>
 #include <vector>
 
 #include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
 #include "device/bluetooth/bluetooth_remote_gatt_characteristic.h"
 #include "device/bluetooth/bluetooth_remote_gatt_descriptor.h"
 #include "device/bluetooth/bluetooth_remote_gatt_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace device {
 
 TestBluetoothAdapterObserver::TestBluetoothAdapterObserver(
     scoped_refptr<BluetoothAdapter> adapter)
     : adapter_(adapter) {
@@ skipping 305 matching lines @@
 
   ASSERT_TRUE(descriptor->GetCharacteristic());
   EXPECT_EQ(
       descriptor->GetCharacteristic()->GetDescriptor(last_gatt_descriptor_id_),
       descriptor);
 
   QuitMessageLoop();
 }
 
 void TestBluetoothAdapterObserver::QuitMessageLoop() {
-  if (base::MessageLoop::current() &&
-      base::MessageLoop::current()->is_running())
+  if (base::RunLoop::IsRunningOnCurrentThread())
     base::MessageLoop::current()->QuitWhenIdle();
 }
 
 }  // namespace device