Revert 113071 - Revert 113047 - Make ExtensionService use ExtensionSet.

chrome/browser/background/background_application_list_model.cc

 // Copyright (c) 2011 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/background/background_application_list_model.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/stl_util.h"
@@ skipping 53 matching lines @@
 
   const Extension* extension_;
   scoped_ptr<SkBitmap> icon_;
   BackgroundApplicationListModel* model_;
   ImageLoadingTracker tracker_;
 };
 
 namespace {
 void GetServiceApplications(ExtensionService* service,
                             ExtensionList* applications_result) {
-  const ExtensionList* extensions = service->extensions();
+  const ExtensionSet* extensions = service->extensions();
 
-  for (ExtensionList::const_iterator cursor = extensions->begin();
+  for (ExtensionSet::const_iterator cursor = extensions->begin();
        cursor != extensions->end();
        ++cursor) {
     const Extension* extension = *cursor;
     if (BackgroundApplicationListModel::IsBackgroundApp(*extension))
       applications_result->push_back(extension);
   }
 
   // Walk the list of terminated extensions also (just because an extension
   // crashed doesn't mean we should ignore it).
   extensions = service->terminated_extensions();
-  for (ExtensionList::const_iterator cursor = extensions->begin();
+  for (ExtensionSet::const_iterator cursor = extensions->begin();
        cursor != extensions->end();
        ++cursor) {
     const Extension* extension = *cursor;
     if (BackgroundApplicationListModel::IsBackgroundApp(*extension))
       applications_result->push_back(extension);
   }
 
   std::string locale = g_browser_process->GetApplicationLocale();
   icu::Locale loc(locale.c_str());
   UErrorCode error = U_ZERO_ERROR;
@@ skipping 251 matching lines @@
          (*old_cursor)->name() == (*new_cursor)->name() &&
          (*old_cursor)->id() == (*new_cursor)->id()) {
     ++old_cursor;
     ++new_cursor;
   }
   if (old_cursor != extensions_.end() || new_cursor != extensions.end()) {
     extensions_ = extensions;
     FOR_EACH_OBSERVER(Observer, observers_, OnApplicationListChanged(profile_));
   }
 }