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

device/bluetooth/bluez/bluetooth_advertisement_bluez_unittest.cc

Index: device/bluetooth/bluez/bluetooth_advertisement_bluez_unittest.cc
diff --git a/device/bluetooth/bluez/bluetooth_advertisement_bluez_unittest.cc b/device/bluetooth/bluez/bluetooth_advertisement_bluez_unittest.cc
index 1d2200535a4a405c7080d0e5e06a6c533bbb4c19..3c7addf719a9a2030df75396cdb5a80e1cd9e66d 100644
--- a/device/bluetooth/bluez/bluetooth_advertisement_bluez_unittest.cc
+++ b/device/bluetooth/bluez/bluetooth_advertisement_bluez_unittest.cc
@@ -93,10 +93,8 @@ class BluetoothAdvertisementBlueZTest : public testing::Test {
     adapter_ = adapter;
     ASSERT_NE(adapter_.get(), nullptr);
     ASSERT_TRUE(adapter_->IsInitialized());
-    if (base::MessageLoop::current() &&
-        base::MessageLoop::current()->is_running()) {
+    if (base::RunLoop::IsRunningOnCurrentThread())
       base::MessageLoop::current()->QuitWhenIdle();
-    }
   }
 
   std::unique_ptr<BluetoothAdvertisement::Data> CreateAdvertisementData() {