Remove usage of FOR_EACH_OBSERVER macro in device/

device/usb/usb_service.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_service.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/memory/ptr_util.h"
 #include "base/threading/thread_task_runner_handle.h"
@@ skipping 35 matching lines @@
 #elif defined(OS_WIN) || defined(OS_MACOSX)
   return base::WrapUnique(new UsbServiceImpl(blocking_task_runner));
 #else
   return nullptr;
 #endif
 }
 
 UsbService::~UsbService() {
   for (const auto& map_entry : devices_)
     map_entry.second->OnDisconnect();
-  FOR_EACH_OBSERVER(Observer, observer_list_, WillDestroyUsbService());
+  for (auto& observer : observer_list_)
+    observer.WillDestroyUsbService();
 }
 
 UsbService::UsbService(
     scoped_refptr<base::SingleThreadTaskRunner> task_runner,
     scoped_refptr<base::SequencedTaskRunner> blocking_task_runner)
     : task_runner_(task_runner), blocking_task_runner_(blocking_task_runner) {}
 
 scoped_refptr<UsbDevice> UsbService::GetDevice(const std::string& guid) {
   DCHECK(CalledOnValidThread());
   auto it = devices_.find(guid);
@@ skipping 53 matching lines @@
   for (const std::string& guid : testing_devices_) {
     auto it = devices_.find(guid);
     DCHECK(it != devices_.end());
     devices->push_back(it->second);
   }
 }
 
 void UsbService::NotifyDeviceAdded(scoped_refptr<UsbDevice> device) {
   DCHECK(CalledOnValidThread());
 
-  FOR_EACH_OBSERVER(Observer, observer_list_, OnDeviceAdded(device));
+  for (auto& observer : observer_list_)
+    observer.OnDeviceAdded(device);
 }
 
 void UsbService::NotifyDeviceRemoved(scoped_refptr<UsbDevice> device) {
   DCHECK(CalledOnValidThread());
 
-  FOR_EACH_OBSERVER(Observer, observer_list_, OnDeviceRemoved(device));
+  for (auto& observer : observer_list_)
+    observer.OnDeviceRemoved(device);
   device->NotifyDeviceRemoved();
-  FOR_EACH_OBSERVER(Observer, observer_list_, OnDeviceRemovedCleanup(device));
+  for (auto& observer : observer_list_)
+    observer.OnDeviceRemovedCleanup(device);
 }
 
 }  // namespace device