status_icons: Change StatusTray to use ScopedVector.

chrome/browser/status_icons/status_tray.cc

 // Copyright (c) 2012 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/status_icons/status_tray.h"
 
 #include <algorithm>
 
-#include "base/stl_util.h"
 #include "chrome/browser/status_icons/status_icon.h"
 
-StatusTray::StatusTray() {
-}
-
 StatusTray::~StatusTray() {
-  STLDeleteElements(&status_icons_);
 }
 
 StatusIcon* StatusTray::CreateStatusIcon() {
   StatusIcon* icon = CreatePlatformStatusIcon();
   if (icon)
     status_icons_.push_back(icon);
   return icon;
 }
 
 void StatusTray::RemoveStatusIcon(StatusIcon* icon) {
-  StatusIconList::iterator i(std::find(status_icons_.begin(),
-                                       status_icons_.end(), icon));
+  StatusIcons::iterator i(
+      std::find(status_icons_.begin(), status_icons_.end(), icon));
+
   if (i == status_icons_.end()) {
     NOTREACHED();
     return;
   }
 
-  delete *i;
   status_icons_.erase(i);
 }
+
+StatusTray::StatusTray() {
+}