Adjust preference sync code to only sync user modifiable preferences.

chrome/test/testing_pref_service.cc

Index: chrome/test/testing_pref_service.cc
diff --git a/chrome/test/testing_pref_service.cc b/chrome/test/testing_pref_service.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e6dde839d66bd62120e8e21a6df2df7487562392
--- /dev/null
+++ b/chrome/test/testing_pref_service.cc
@@ -0,0 +1,60 @@
+// Copyright (c) 2010 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.
+
+#include "chrome/test/testing_pref_service.h"
+
+#include "chrome/browser/dummy_pref_store.h"
+#include "chrome/browser/pref_value_store.h"
+
+TestingPrefService::TestingPrefService()
+    : PrefService(new PrefValueStore(
+          managed_prefs_ = new DummyPrefStore(),
+          NULL,
+          NULL,
+          user_prefs_ = new DummyPrefStore(),
+          NULL)) {
+}
+
+const Value* TestingPrefService::GetManagedPref(const wchar_t* path) {
+  return GetPref(managed_prefs_, path);
+}
+
+void TestingPrefService::SetManagedPref(const wchar_t* path, Value* value) {
+  SetPref(managed_prefs_, path, value);
+}
+
+void TestingPrefService::RemoveManagedPref(const wchar_t* path) {
+  RemovePref(managed_prefs_, path);
+}
+
+const Value* TestingPrefService::GetUserPref(const wchar_t* path) {
+  return GetPref(user_prefs_, path);
+}
+
+void TestingPrefService::SetUserPref(const wchar_t* path, Value* value) {
+  SetPref(user_prefs_, path, value);
+}
+
+void TestingPrefService::RemoveUserPref(const wchar_t* path) {
+  RemovePref(user_prefs_, path);
+}
+
+const Value* TestingPrefService::GetPref(PrefStore* pref_store,
+                                         const wchar_t* path) {
+  Value* result;
+  return pref_store->prefs()->Get(path, &result) ? result : NULL;
+}
+
+void TestingPrefService::SetPref(PrefStore* pref_store,
+                                 const wchar_t* path,
+                                 Value* value) {
+  pref_store->prefs()->Set(path, value);
+  FireObservers(path);
+}
+
+void TestingPrefService::RemovePref(PrefStore* pref_store,
+                                    const wchar_t* path) {
+  pref_store->prefs()->Remove(path, NULL);
+  FireObservers(path);
+}