Implemented ForceMaximizeBrowserWindowOnFirstRun policy, added unit test and browser test.

chrome/browser/chromeos/policy/login_policy_test_base.h

+// Copyright 2015 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.
+
+#ifndef CHROME_BROWSER_CHROMEOS_POLICY_LOGIN_POLICY_TEST_BASE_H_
+#define CHROME_BROWSER_CHROMEOS_POLICY_LOGIN_POLICY_TEST_BASE_H_
+
+#include <string>
+
+#include "base/files/scoped_temp_dir.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/chromeos/login/test/oobe_base_test.h"
+
+namespace base {
+class FilePath;
+}
+
+namespace policy {
+
+class LocalPolicyTestServer;
+
+// This class can be used to implement tests which need policy to be set prior
+// to login.
+class LoginPolicyTestBase : public chromeos::OobeBaseTest {
+ protected:
+  LoginPolicyTestBase();
+  ~LoginPolicyTestBase() override;
+
+  // chromeos::OobeBaseTest::
+  void SetUp() override;
+  void SetUpCommandLine(base::CommandLine* command_line) override;
+  void SetUpOnMainThread() override;
+
+  virtual base::DictionaryValue* GetMandatoryPoliciesValue() const;

[bartfab (slow), 2015/04/02 13:29:31]

Nit 1: Forward-declare base::DictionaryValue.
Nit 2: When passing ownership, always use a scoped_ptr.

[peletskyi, 2015/04/02 15:24:50]

Done.

+  virtual base::DictionaryValue* GetRecommendedPoliciesValue() const;
+
+  void SkipToLoginScreen();
+  void LogIn(const std::string& user_id, const std::string& password);
+
+  static const char kAccountPassword[];
+  static const char kAccountId[];
+
+ private:
+  void SetUpGaiaServerWithAccessTokens();
+  void SetMergeSessionParams(const std::string& email);
+  void SetServerPolicy();
+  base::FilePath PolicyFilePath() const;
+
+  scoped_ptr<LocalPolicyTestServer> test_server_;
+  base::ScopedTempDir temp_dir_;
+
+  DISALLOW_COPY_AND_ASSIGN(LoginPolicyTestBase);
+};
+
+}  // namespace policy
+
+#endif  // CHROME_BROWSER_CHROMEOS_POLICY_LOGIN_POLICY_TEST_BASE_H_