Pref service: Filter updates from read-only pref stores.

services/preferences/persistent_pref_store_impl_unittest.cc

Index: services/preferences/persistent_pref_store_impl_unittest.cc
diff --git a/services/preferences/persistent_pref_store_impl_unittest.cc b/services/preferences/persistent_pref_store_impl_unittest.cc
index 6537ea0c1f4743f1c4c0170aecd0045b867f58cd..f6c9fc2701dcf6cf4f85770773b40ae5915aad06 100644
--- a/services/preferences/persistent_pref_store_impl_unittest.cc
+++ b/services/preferences/persistent_pref_store_impl_unittest.cc
@@ -158,25 +158,6 @@ TEST_F(PersistentPrefStoreImplTest, InitializationFailure) {
   EXPECT_TRUE(pref_store()->ReadOnly());
 }
 
-class TestReadErrorDelegate : public PersistentPrefStore::ReadErrorDelegate {
- public:
-  TestReadErrorDelegate(PersistentPrefStore::PrefReadError* storage,
-                        const base::Closure& quit)
-      : storage_(storage), quit_(quit) {
-    DCHECK(storage_);
-    DCHECK(quit_);
-  }
-
-  void OnError(PersistentPrefStore::PrefReadError error) override {
-    *storage_ = error;
-    quit_.Run();
-  }
-
- private:
-  PersistentPrefStore::PrefReadError* const storage_;
-  const base::Closure quit_;
-};
-
 TEST_F(PersistentPrefStoreImplTest, InitialValue) {
   auto backing_pref_store = make_scoped_refptr(new InMemoryPrefStore());
   const base::Value value("value");