Implemented ForceMaximizeBrowserWindowOnFirstRun policy, added unit test and browser test.

chrome/browser/chromeos/policy/login_policy_test_base.cc

+// 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.
+
+#include "base/command_line.h"
+#include "base/files/file_path.h"

[bartfab (slow), 2015/04/01 14:22:42]

Nit: Move this to the header file.

[peletskyi, 2015/04/01 18:55:46]

Why?

[bartfab (slow), 2015/04/02 08:44:28]

Because I thought that you needed the full type in the header. Now that I stand
corrected, this LGTM.

+#include "base/files/file_util.h"
+#include "chrome/browser/chrome_notification_types.h"
+#include "chrome/browser/chromeos/login/ui/webui_login_display.h"
+#include "chrome/browser/chromeos/login/wizard_controller.h"
+#include "chrome/browser/chromeos/policy/login_policy_test_base.h"
+#include "chrome/browser/policy/test/local_policy_test_server.h"
+#include "chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h"
+#include "components/policy/core/common/cloud/cloud_policy_constants.h"
+#include "components/policy/core/common/policy_switches.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/test/test_utils.h"
+#include "google_apis/gaia/fake_gaia.h"
+#include "google_apis/gaia/gaia_constants.h"
+#include "google_apis/gaia/gaia_urls.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "url/gurl.h"
+
+namespace policy {
+
+namespace {
+
+const char kTestAuthCode[] = "fake-auth-code";
+const char kTestGaiaUberToken[] = "fake-uber-token";
+const char kTestAuthLoginAccessToken[] = "fake-access-token";
+const char kTestRefreshToken[] = "fake-refresh-token";
+const char kTestAuthSIDCookie[] = "fake-auth-SID-cookie";
+const char kTestAuthLSIDCookie[] = "fake-auth-LSID-cookie";
+const char kTestSessionSIDCookie[] = "fake-session-SID-cookie";
+const char kTestSessionLSIDCookie[] = "fake-session-LSID-cookie";
+const char kTestUserinfoToken[] = "fake-userinfo-token";
+
+std::string GetPolicy(const std::string& mandatory,
+                      const std::string& recommended,
+                      const std::string& policyType,
+                      const std::string& account) {
+  std::string ret =

[bartfab (slow), 2015/04/01 14:22:42]

1: Construct a base::DictionaryValue and use base::JSONWriter to generate the
string instead of constructing JSON manually.
2: Nit: Avoid abbreviations like |ret|
3: Nit: const.

[peletskyi, 2015/04/01 18:55:46]

2,3 Done.
1. I think the code will be rather complicated with jsonwriter.

[bartfab (slow), 2015/04/02 08:44:28]

Re 1: Why would it be complicated? You could even do it like this:

* Store the initial JSON structure as an explicit string constant.
* Parse this structure into a DictionaryValue.
* Add any data you need, such as the policy user, mandatory and recommended
policies.
* Write back to JSON.

It should all be no more than 20 lines of code.

Re 3: No, not done.

[peletskyi, 2015/04/02 12:53:29]

Done.

+      "{"
+      "  \"" +
+      policyType +
+      "\": {"
+      "    \"mandatory\": {" +
+      mandatory +
+      "},"
+      "    \"recommended\": {" +
+      recommended +
+      "}"
+      "  },"
+      "  \"managed_users\": [ \"*\" ],"
+      "  \"policy_user\": \"" +
+      account +
+      "\","
+      "  \"current_key_index\": 0"
+      "}";
+  return ret;
+}
+
+}  // namespace
+
+const char LoginPolicyTestBase::kAccountPassword[] = "letmein";
+const char LoginPolicyTestBase::kAccountId[] = "dla1@example.com";
+
+LoginPolicyTestBase::LoginPolicyTestBase() {
+  set_open_about_blank_on_browser_launch(false);
+}
+
+LoginPolicyTestBase::~LoginPolicyTestBase() {
+}
+
+void LoginPolicyTestBase::SetUp() {
+  ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
+  SetServerPolicy();
+
+  test_server_.reset(new LocalPolicyTestServer(PolicyFilePath()));
+  ASSERT_TRUE(test_server_->Start());
+
+  OobeBaseTest::SetUp();
+}
+
+void LoginPolicyTestBase::SetUpCommandLine(base::CommandLine* command_line) {
+  command_line->AppendSwitchASCII(policy::switches::kDeviceManagementUrl,
+                                  test_server_->GetServiceURL().spec());
+  OobeBaseTest::SetUpCommandLine(command_line);
+}
+
+void LoginPolicyTestBase::SetUpOnMainThread() {
+  SetMergeSessionParams(kAccountId);
+  SetUpGaiaServerWithAccessTokens();
+  OobeBaseTest::SetUpOnMainThread();
+}
+
+std::string LoginPolicyTestBase::GetMandatoryPolicies() const {
+  return "";
+}
+
+std::string LoginPolicyTestBase::GetRecommendedPolicies() const {
+  return "";
+}
+
+void LoginPolicyTestBase::SetUpGaiaServerWithAccessTokens() {
+  FakeGaia::AccessTokenInfo token_info;
+  token_info.token = kTestUserinfoToken;
+  token_info.scopes.insert(GaiaConstants::kDeviceManagementServiceOAuth);
+  token_info.scopes.insert(GaiaConstants::kOAuthWrapBridgeUserInfoScope);
+  token_info.audience = GaiaUrls::GetInstance()->oauth2_chrome_client_id();
+  token_info.email = kAccountId;
+  fake_gaia_->IssueOAuthToken(kTestRefreshToken, token_info);
+}
+
+void LoginPolicyTestBase::SetMergeSessionParams(const std::string& email) {
+  FakeGaia::MergeSessionParams params;
+  params.auth_sid_cookie = kTestAuthSIDCookie;
+  params.auth_lsid_cookie = kTestAuthLSIDCookie;
+  params.auth_code = kTestAuthCode;
+  params.refresh_token = kTestRefreshToken;
+  params.access_token = kTestAuthLoginAccessToken;
+  params.gaia_uber_token = kTestGaiaUberToken;
+  params.session_sid_cookie = kTestSessionSIDCookie;
+  params.session_lsid_cookie = kTestSessionLSIDCookie;
+  params.email = email;
+  fake_gaia_->SetMergeSessionParams(params);
+}
+
+void LoginPolicyTestBase::SkipToLoginScreen() {
+  chromeos::WizardController::SkipPostLoginScreensForTesting();
+  chromeos::WizardController* wizard_controller =
+      chromeos::WizardController::default_controller();
+  ASSERT_TRUE(wizard_controller);
+  wizard_controller->SkipToLoginForTesting(chromeos::LoginScreenContext());
+
+  content::WindowedNotificationObserver(
+      chrome::NOTIFICATION_LOGIN_OR_LOCK_WEBUI_VISIBLE,
+      content::NotificationService::AllSources()).Wait();
+}
+
+void LoginPolicyTestBase::LogIn(const std::string& user_id,
+                                const std::string& password) {
+  GetLoginDisplay()->ShowSigninScreenForCreds(user_id, password);
+
+  content::WindowedNotificationObserver(
+      chrome::NOTIFICATION_SESSION_STARTED,
+      content::NotificationService::AllSources()).Wait();
+}
+
+void LoginPolicyTestBase::SetServerPolicy() {
+  const std::string policy =
+      GetPolicy(GetMandatoryPolicies(), GetRecommendedPolicies(),
+                dm_protocol::kChromeUserPolicyType, kAccountId);
+
+  const int bytes_written =
+      base::WriteFile(PolicyFilePath(), policy.data(), policy.size());
+  ASSERT_EQ(static_cast<int>(policy.size()), bytes_written);
+}
+
+base::FilePath LoginPolicyTestBase::PolicyFilePath() const {
+  return temp_dir_.path().AppendASCII("policy.json");
+}
+
+}  // namespace policy