Replace FOR_EACH_OBSERVER in components/drive with range-based for

components/drive/drive_app_registry.cc

 // Copyright 2014 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 "components/drive/drive_app_registry.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <set>
@@ skipping 171 matching lines @@
                                  app.create_url(),
                                  app.is_removable());
 
     // TODO(kinaba): consider taking primary/secondary distinction into account.
     AddAppSelectorList(app.primary_mimetypes(), id, &mimetype_map_);
     AddAppSelectorList(app.secondary_mimetypes(), id, &mimetype_map_);
     AddAppSelectorList(app.primary_file_extensions(), id, &extension_map_);
     AddAppSelectorList(app.secondary_file_extensions(), id, &extension_map_);
   }
 
-  FOR_EACH_OBSERVER(DriveAppRegistryObserver,
-                    observers_,
-                    OnDriveAppRegistryUpdated());
+  for (auto& observer : observers_)
+    observer.OnDriveAppRegistryUpdated();
 }
 
 void DriveAppRegistry::AddObserver(DriveAppRegistryObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void DriveAppRegistry::RemoveObserver(DriveAppRegistryObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
@@ skipping 36 matching lines @@
 
   // Go forward while the size is larger or equal to preferred_size.
   size_t i = 1;
   while (i < sorted_icons.size() && sorted_icons[i].first >= preferred_size)
     ++i;
   return sorted_icons[i - 1].second;
 }
 
 }  // namespace util
 }  // namespace drive