Protect AppListItemList Add/Remove and fix sync bugs

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

Index: chrome/browser/sync/test/integration/sync_app_list_helper.h
diff --git a/chrome/browser/sync/test/integration/sync_app_list_helper.h b/chrome/browser/sync/test/integration/sync_app_list_helper.h
index 91d873409e70fe4d6e6eb22fdd0e9feef73a2353..173716c0f6df19db17aa9dfd49b74e7739cea440 100644
--- a/chrome/browser/sync/test/integration/sync_app_list_helper.h
+++ b/chrome/browser/sync/test/integration/sync_app_list_helper.h
@@ -14,6 +14,10 @@
 class Profile;
 class SyncTest;
 
+namespace app_list {
+class AppListItem;
+}
+
 class SyncAppListHelper {
  public:
   // Singleton implementation.
@@ -46,6 +50,11 @@ class SyncAppListHelper {
   // 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_;