Reduce FOR_EACH_OBSERVER usage in extensions

extensions/browser/script_executor.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 "extensions/browser/script_executor.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 150 matching lines @@
       // We never finished the root frame injection.
       root_frame_error_ =
           root_is_main_frame_ ? kRendererDestroyed : kFrameRemoved;
       results_.Clear();
     }
 
     if (script_observers_.get() && root_frame_error_.empty() &&
         host_id_.type() == HostID::EXTENSIONS) {
       ScriptExecutionObserver::ExecutingScriptsMap id_map;
       id_map[host_id_.id()] = std::set<std::string>();
-      FOR_EACH_OBSERVER(
-          ScriptExecutionObserver, *script_observers_,
-          OnScriptsExecuted(web_contents(), id_map, root_frame_url_));
+      for (auto& observer : *script_observers_)
+        observer.OnScriptsExecuted(web_contents(), id_map, root_frame_url_);
     }
 
     if (!callback_.is_null())
       callback_.Run(root_frame_error_, root_frame_url_, results_);
     delete this;
   }
 
   base::WeakPtr<base::ObserverList<ScriptExecutionObserver>> script_observers_;
 
   // The id of the host (the extension or the webui) doing the injection.
@@ skipping 85 matching lines @@
   params.file_url = file_url;
   params.wants_result = (result_type == JSON_SERIALIZED_RESULT);
   params.user_gesture = user_gesture;
 
   // Handler handles IPCs and deletes itself on completion.
   new Handler(script_observers_, web_contents_, params, frame_scope, frame_id,
               callback);
 }
 
 }  // namespace extensions