chrome/browser/extensions: Change auto to not deduce raw pointers.

chrome/browser/extensions/api/cast_devices_private/cast_devices_private_api.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 "chrome/browser/extensions/api/cast_devices_private/cast_devices_private_api.h"
 
 #include "base/lazy_instance.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/common/extensions/api/cast_devices_private.h"
 
@@ skipping 81 matching lines @@
   auto params =
       api::cast_devices_private::UpdateDevices::Params::Create(*args_);
 
   CastDeviceUpdateListeners::ReceiverAndActivityList devices;
   for (const api::cast_devices_private::ReceiverActivity& device :
        params->devices) {
     devices.push_back(
         ConvertReceiverAndActivityType(device.receiver, device.activity.get()));
   }
 
-  auto listeners = CastDeviceUpdateListeners::Get(browser_context());
+  auto* listeners = CastDeviceUpdateListeners::Get(browser_context());
   listeners->NotifyCallbacks(devices);
 
   return RespondNow(NoArguments());
 }
 
 }  // namespace extensions