Decouple killbit testing from external extension providers

chrome/browser/extensions/extensions_service.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSIONS_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSIONS_SERVICE_H_
 #pragma once
 
 #include <map>
-#include <set>
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/gtest_prod_util.h"
 #include "base/linked_ptr.h"
 #include "base/ref_counted.h"
 #include "base/task.h"
 #include "base/time.h"
@@ skipping 580 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(ExtensionsServiceTest,
                            UpdatePendingExtensionAlreadyInstalled);
   FRIEND_TEST_ALL_PREFIXES(ExtensionsServiceTest,
                            InstallAppsWithUnlimtedStorage);
   FRIEND_TEST_ALL_PREFIXES(ExtensionsServiceTest,
                            InstallAppsAndCheckStorageProtection);
   DISALLOW_COPY_AND_ASSIGN(ExtensionsService);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSIONS_SERVICE_H_