Protect AppListItemList Add/Remove and fix sync bugs

chrome/browser/sync/test/integration/sync_app_list_helper.h

 // Copyright 2013 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_SYNC_TEST_INTEGRATION_SYNC_APP_LIST_HELPER_H_
 #define CHROME_BROWSER_SYNC_TEST_INTEGRATION_SYNC_APP_LIST_HELPER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/singleton.h"
 #include "sync/api/string_ordinal.h"
 
 class Profile;
 class SyncTest;
 
+namespace app_list {
+class AppListItem;
+}
+
 class SyncAppListHelper {
  public:
   // Singleton implementation.
   static SyncAppListHelper* GetInstance();
 
   // Initializes the profiles in |test| and registers them with
   // internal data structures.
   void SetupIfNecessary(SyncTest* test);
 
   // Returns true iff all existing profiles have the same app list entries
@@ skipping 12 matching lines @@
  private:
   friend struct DefaultSingletonTraits<SyncAppListHelper>;
 
   SyncAppListHelper();
   ~SyncAppListHelper();
 
   // Returns true iff |profile| has the same app list as |test_|->verifier()
   // and the app list entries all have the same state.
   bool AppListMatchesVerifier(Profile* profile);
 
+  // Helper function for debugging, logs info for an item.
+  void PrintItem(Profile* profile,
+                 app_list::AppListItem* item,
+                 const std::string& label);
+
   SyncTest* test_;
   bool setup_completed_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncAppListHelper);
 };
 
 #endif  // CHROME_BROWSER_SYNC_TEST_INTEGRATION_SYNC_APP_LIST_HELPER_H_