Remove usage of FOR_EACH_OBSERVER macro in device/

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 55 matching lines @@
 void UsbDevice::ActiveConfigurationChanged(int configuration_value) {
   for (const auto& config : configurations_) {
     if (config.configuration_value == configuration_value) {
       active_configuration_ = &config;
       return;
     }
   }
 }
 
 void UsbDevice::NotifyDeviceRemoved() {
-  FOR_EACH_OBSERVER(Observer, observer_list_, OnDeviceRemoved(this));
+  for (auto& observer : observer_list_)
+    observer.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_)
     handle->Close();
 }
 
 void UsbDevice::HandleClosed(UsbDeviceHandle* handle) {
   handles_.remove(handle);
 }
 
 }  // namespace device