device: Change auto to not deduce raw pointers.

device/usb/usb_device.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/usb/usb_device.h"
 
 #include "base/guid.h"
 #include "device/usb/usb_device_handle.h"
 #include "device/usb/webusb_descriptors.h"
 
@@ skipping 62 matching lines @@
 }
 
 void UsbDevice::NotifyDeviceRemoved() {
   FOR_EACH_OBSERVER(Observer, observer_list_, OnDeviceRemoved(this));
 }
 
 void UsbDevice::OnDisconnect() {
   // Swap out the handle list as HandleClosed() will try to modify it.
   std::list<UsbDeviceHandle*> handles;
   handles.swap(handles_);
-  for (auto handle : handles_)
+  for (auto* handle : handles_)
     handle->Close();
 }
 
 void UsbDevice::HandleClosed(UsbDeviceHandle* handle) {
   handles_.remove(handle);
 }
 
 }  // namespace device