Add a hack to allow us to disable extension garbage collection.

chrome/browser/extensions/extension_service.h

Index: chrome/browser/extensions/extension_service.h
diff --git a/chrome/browser/extensions/extension_service.h b/chrome/browser/extensions/extension_service.h
index 01fabca9f20b96d4364c650723413a1406a0031f..d20b306859bd310ece1f6417728ac4198575d132 100644
--- a/chrome/browser/extensions/extension_service.h
+++ b/chrome/browser/extensions/extension_service.h
@@ -695,6 +695,15 @@ class ExtensionService
   // sync_start_util for more.
   void SetSyncStartFlare(const syncer::SyncableService::StartSyncFlare& flare);
 
+#if defined(OS_CHROMEOS)
+  void disable_garbage_collection() {
+    disable_garbage_collection_ = true;
+  }
+  void enable_garbage_collection() {
+    disable_garbage_collection_ = false;
+  }
+#endif
+
  private:
   // Contains Extension data that can change during the life of the process,
   // but does not persist across restarts.
@@ -960,6 +969,14 @@ class ExtensionService
   // asynchronously via MergeDataAndStartSyncing as soon as possible.
   syncer::SyncableService::StartSyncFlare flare_;
 
+#if defined(OS_CHROMEOS)
+  // TODO(rkc): HACK alert - this is only in place to allow the
+  // kiosk_mode_screensaver to prevent its extension from getting garbage
+  // collected. Remove this once KioskModeScreensaver is removed.
+  // See crbug.com/280363
+  bool disable_garbage_collection_;
+#endif
+
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,
                            InstallAppsWithUnlimtedStorage);
   FRIEND_TEST_ALL_PREFIXES(ExtensionServiceTest,