Add ManagedUserSettingsService and a SupervisedUserPrefStore using it.

chrome/browser/managed_mode/managed_user_settings_service_unittest.cc

+// Copyright 2013 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 "base/bind.h"
+#include "base/callback.h"
+#include "base/prefs/testing_pref_store.h"
+#include "chrome/browser/managed_mode/managed_user_settings_service.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+const char kAtomicItemName[] = "X-Wombat";
+const char kSettingsName[] = "TestingSetting";
+const char kSettingsValue[] = "SettingsValue";
+const char kSplitItemName[] = "X-SuperMoosePowers";
+
+class ManagedUserSettingsServiceTest : public ::testing::Test {
+ protected:
+  ManagedUserSettingsServiceTest() {}
+  virtual ~ManagedUserSettingsServiceTest() {}
+
+  void OnNewSettingsAvailable(const base::DictionaryValue* settings) {
+    if (!settings)
+      settings_.reset();
+    else
+      settings_.reset(settings->DeepCopy());
+  }
+
+  // testing::Test overrides:
+  virtual void SetUp() OVERRIDE {
+    TestingPrefStore* pref_store = new TestingPrefStore;
+    settings_service_.Init(pref_store);
+    settings_service_.Subscribe(
+        base::Bind(&ManagedUserSettingsServiceTest::OnNewSettingsAvailable,
+                   base::Unretained(this)));
+    pref_store->SetInitializationCompleted();
+    ASSERT_FALSE(settings_);
+    settings_service_.Activate();
+    ASSERT_TRUE(settings_);
+  }
+
+  virtual void TearDown() OVERRIDE {
+    settings_service_.Shutdown();
+  }
+
+  base::DictionaryValue split_items_;
+  scoped_ptr<base::Value> atomic_setting_value_;
+  ManagedUserSettingsService settings_service_;
+  scoped_ptr<base::DictionaryValue> settings_;
+};
+
+TEST_F(ManagedUserSettingsServiceTest, SetLocalSetting) {
+  const base::Value* value = NULL;
+  EXPECT_FALSE(settings_->GetWithoutPathExpansion(kSettingsName, &value));
+
+  settings_.reset();
+  settings_service_.SetLocalSettingForTesting(
+      kSettingsName,
+      scoped_ptr<base::Value>(new base::StringValue(kSettingsValue)));
+  ASSERT_TRUE(settings_);
+  ASSERT_TRUE(settings_->GetWithoutPathExpansion(kSettingsName, &value));
+  std::string string_value;
+  EXPECT_TRUE(value->GetAsString(&string_value));
+  EXPECT_EQ(kSettingsValue, string_value);
+}