AppCaches which belong to hosted apps are not protected from deletion

webkit/appcache/mock_appcache_storage.h

Index: webkit/appcache/mock_appcache_storage.h
diff --git a/webkit/appcache/mock_appcache_storage.h b/webkit/appcache/mock_appcache_storage.h
index 66ed4a7da6c88fef38451b85cc05b9e68d4b1e5e..827bad6217fa9252f693c5a33125795b8a7290e3 100644
--- a/webkit/appcache/mock_appcache_storage.h
+++ b/webkit/appcache/mock_appcache_storage.h
@@ -18,6 +18,11 @@
 #include "webkit/appcache/appcache_group.h"
 #include "webkit/appcache/appcache_storage.h"
 
+namespace browsing_data_remover_test {
+void AddGroupAndCache(ChromeAppCacheService* appcache_service,
+                      const GURL& manifest_url);
+}
+
 namespace appcache {
 
 // For use in unit tests.
@@ -185,6 +190,8 @@ class MockAppCacheStorage : public AppCacheStorage {
   FRIEND_TEST_ALL_PREFIXES(MockAppCacheStorageTest,
                            StoreExistingGroupExistingCache);
   FRIEND_TEST_ALL_PREFIXES(AppCacheServiceTest, DeleteAppCachesForOrigin);
+  friend void browsing_data_remover_test::AddGroupAndCache(
+      ChromeAppCacheService* appcache_service, const GURL& manifest_url);
 
   DISALLOW_COPY_AND_ASSIGN(MockAppCacheStorage);
 };