Implement chrome.systemPrivate.getIncognitoModeAvailability extension API function

chrome/browser/extensions/extension_preference_apitest.cc

 // Copyright (c) 2011 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/utf_string_conversions.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "webkit/plugins/npapi/mock_plugin_list.h"
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, PreferenceApi) {
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableExperimentalExtensionApis);
 
   PrefService* pref_service = browser()->profile()->GetPrefs();
   pref_service->SetBoolean(prefs::kAlternateErrorPagesEnabled, false);
   pref_service->SetBoolean(prefs::kAutofillEnabled, false);
   pref_service->SetBoolean(prefs::kBlockThirdPartyCookies, true);
   pref_service->SetBoolean(prefs::kEnableHyperlinkAuditing, false);
   pref_service->SetBoolean(prefs::kEnableReferrers, false);
   pref_service->SetBoolean(prefs::kEnableTranslate, false);
   pref_service->SetBoolean(prefs::kInstantEnabled, false);
   pref_service->SetBoolean(prefs::kNetworkPredictionEnabled, false);
   pref_service->SetBoolean(prefs::kSafeBrowsingEnabled, false);
   pref_service->SetBoolean(prefs::kSearchSuggestEnabled, false);
+  pref_service->SetInteger(prefs::kIncognitoModeAvailability, 1);
 
   EXPECT_TRUE(RunExtensionTest("preference/standard")) << message_;
 
   const PrefService::Preference* pref = pref_service->FindPreference(
       prefs::kBlockThirdPartyCookies);
   ASSERT_TRUE(pref);
   EXPECT_TRUE(pref->IsExtensionControlled());
   EXPECT_TRUE(pref_service->GetBoolean(prefs::kAlternateErrorPagesEnabled));
   EXPECT_TRUE(pref_service->GetBoolean(prefs::kAutofillEnabled));
   EXPECT_FALSE(pref_service->GetBoolean(prefs::kBlockThirdPartyCookies));
   EXPECT_TRUE(pref_service->GetBoolean(prefs::kEnableHyperlinkAuditing));
   EXPECT_TRUE(pref_service->GetBoolean(prefs::kEnableReferrers));
   EXPECT_TRUE(pref_service->GetBoolean(prefs::kEnableTranslate));
   EXPECT_TRUE(pref_service->GetBoolean(prefs::kInstantEnabled));
   EXPECT_TRUE(pref_service->GetBoolean(prefs::kNetworkPredictionEnabled));
   EXPECT_TRUE(pref_service->GetBoolean(prefs::kSafeBrowsingEnabled));
   EXPECT_TRUE(pref_service->GetBoolean(prefs::kSearchSuggestEnabled));
+  EXPECT_EQ(1, pref_service->GetInteger(prefs::kIncognitoModeAvailability));
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, PreferencePersistentIncognito) {
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableExperimentalExtensionApis);
 
   PrefService* prefs = browser()->profile()->GetPrefs();
   prefs->SetBoolean(prefs::kBlockThirdPartyCookies, false);
 
   EXPECT_TRUE(
@@ skipping 70 matching lines @@
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, PreferenceOnChange) {
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableExperimentalExtensionApis);
 
   PrefService* prefs = browser()->profile()->GetPrefs();
   prefs->SetBoolean(prefs::kBlockThirdPartyCookies, false);
 
   EXPECT_TRUE(RunExtensionTestIncognito("preference/onchange")) <<
       message_;
 }