Add policy for fullscreen mode; disallow fullscreen in public sessions

chrome/browser/policy/policy_browsertest.cc

 // Copyright (c) 2012 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 <algorithm>
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 1769 matching lines @@
   blacklist.Append(base::Value::CreateStringValue(folder_path));
   policies.Set(key::kURLBlacklist, POLICY_LEVEL_MANDATORY,
                POLICY_SCOPE_USER, blacklist.DeepCopy(), NULL);
   UpdateProviderPolicy(policies);
   FlushBlacklistPolicy();
 
   CheckCanOpenURL(browser(), file_path1.c_str());
   CheckURLIsBlocked(browser(), file_path2.c_str());
 }
 
+IN_PROC_BROWSER_TEST_F(PolicyTest, AllowFullscreen) {
+  PolicyMap policies;
+  policies.Set(key::kAllowFullscreen,
+               POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
+               base::Value::CreateBooleanValue(false), NULL);
+  UpdateProviderPolicy(policies);
+
+  BrowserWindow* browser_window = browser()->window();
+  ASSERT_TRUE(browser_window);
+
+  EXPECT_FALSE(browser_window->IsFullscreen());
+  chrome::ToggleFullscreenMode(browser());
+  EXPECT_FALSE(browser_window->IsFullscreen());
+}
+
 #if defined(OS_CHROMEOS)
 IN_PROC_BROWSER_TEST_F(PolicyTest, DisableScreenshotsFile) {
   int screenshot_count = CountScreenshots();
 
   // Make sure screenshots are counted correctly.
   TestScreenshotFile(true);
   ASSERT_EQ(CountScreenshots(), screenshot_count + 1);
 
   // Check if trying to take a screenshot fails when disabled by policy.
   TestScreenshotFile(false);
@@ skipping 678 matching lines @@
       chrome_variations::VariationsService::GetVariationsServerURL(
           g_browser_process->local_state());
   EXPECT_TRUE(StartsWithASCII(url.spec(), default_variations_url, true));
   std::string value;
   EXPECT_TRUE(net::GetValueForKeyInQuery(url, "restrict", &value));
   EXPECT_EQ("restricted", value);
 }
 #endif
 
 }  // namespace policy