Replace FOR_EACH_OBSERVER in c/b/chromeos with range-based for

chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.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 "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
 
 #include <stdint.h>
 #include <numeric>
 #include <utility>
 #include <vector>
@@ skipping 318 matching lines @@
     on_finish_.reset();
   }
 
   // This method is called by callback, when load request is finished.
   void OnWallpaperSet() {
     DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
     // The only known case for this check to fail is global destruction during
     // wallpaper load. It should never happen.
     if (!BrowserThread::CurrentlyOn(BrowserThread::UI))
-      return; // We are in a process of global destruction.
+      return;  // We are in a process of global destruction.
 
     timer.Stop();  // Erase reference to self.
 
     WallpaperManager* manager = WallpaperManager::Get();
     if (!started_load_at_.is_null()) {
       const base::TimeDelta elapsed = base::Time::Now() - started_load_at_;
       manager->SaveLastLoadTime(elapsed);
     }
     if (manager->pending_inactive_ == this) {
       // ProcessRequest() was never executed.
@@ skipping 524 matching lines @@
   DCHECK(loading_.size() > 0);
   for (WallpaperManager::PendingList::iterator i = loading_.begin();
        i != loading_.end();
        ++i) {
     if (i->get() == pending) {
       loading_.erase(i);
       break;
     }
   }
 
-  if (loading_.empty())
-    FOR_EACH_OBSERVER(Observer, observers_, OnPendingListEmptyForTesting());
+  if (loading_.empty()) {
+    for (auto& observer : observers_)
+      observer.OnPendingListEmptyForTesting();
+  }
 }
 
 void WallpaperManager::SetPolicyControlledWallpaper(
     const AccountId& account_id,
     std::unique_ptr<user_manager::UserImage> user_image) {
   if (!CanGetFilesId()) {
     CallWhenCanGetFilesId(
         base::Bind(&WallpaperManager::SetPolicyControlledWallpaper,
                    weak_factory_.GetWeakPtr(), account_id,
                    base::Passed(std::move(user_image))));
@@ skipping 284 matching lines @@
                                               &stored_value)) {
     return wallpaper::WallpaperFilesId::FromString(stored_value);
   }
   const std::string& old_id = account_id.GetUserEmail();  // Migrated
   const wallpaper::WallpaperFilesId files_id = HashWallpaperFilesIdStr(old_id);
   SetKnownUserWallpaperFilesId(account_id, files_id);
   return files_id;
 }
 
 }  // namespace chromeos