Sign out profile when local_state file has been changed.

chrome/browser/signin/signin_util_unittest.cc

+// Copyright 2016 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/browser/signin/signin_util.h"
+
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/prefs/browser_prefs.h"
+#include "chrome/common/pref_names.h"
+#include "chrome/test/base/browser_with_test_window_test.h"
+#include "chrome/test/base/testing_browser_process.h"
+#include "components/prefs/pref_service.h"
+#include "components/prefs/testing_pref_service.h"
+
+class SigninUtilTest : public BrowserWithTestWindowTest {
+ public:
+  void SetUp() override {
+    BrowserWithTestWindowTest::SetUp();
+
+    prefs_.reset(new TestingPrefServiceSimple());
+  }
+
+  void TearDown() override { BrowserWithTestWindowTest::TearDown(); }
+
+  std::unique_ptr<TestingPrefServiceSimple> prefs_;
+};
+
+TEST_F(SigninUtilTest, GetForceSigninPolicy) {
+  ASSERT_FALSE(signin_util::IsForceSigninEnabled());
+  chrome::RegisterLocalState(prefs_->registry());
+  TestingBrowserProcess::GetGlobal()->SetLocalState(prefs_.get());
+
+  g_browser_process->local_state()->SetBoolean(prefs::kForceBrowserSignin,
+                                               true);
+  ASSERT_TRUE(signin_util::IsForceSigninEnabled());
+  g_browser_process->local_state()->SetBoolean(prefs::kForceBrowserSignin,
+                                               false);
+  ASSERT_TRUE(signin_util::IsForceSigninEnabled());
+
+  TestingBrowserProcess::GetGlobal()->SetLocalState(nullptr);
+}