Add policy for fullscreen mode; disallow fullscreen in public sessions

chrome/browser/ui/fullscreen/fullscreen_controller.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 "chrome/browser/ui/fullscreen/fullscreen_controller.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/app_mode/app_mode_utils.h"
@@ skipping 10 matching lines @@
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_contents.h"
 
 #if defined(OS_MACOSX)
 #include "base/mac/mac_util.h"
+#else
+#include "base/prefs/pref_service.h"
+#include "chrome/common/pref_names.h"
 #endif
 
 using content::RenderViewHost;
 using content::UserMetricsAction;
 using content::WebContents;
 
 FullscreenController::FullscreenController(Browser* browser)
     : ptr_factory_(this),
       browser_(browser),
       window_(browser->window()),
@@ skipping 504 matching lines @@
     else
       enter_fullscreen |= window_->IsFullscreenWithChrome();
   }
 #endif
 
   // In kiosk mode, we always want to be fullscreen. When the browser first
   // starts we're not yet fullscreen, so let the initial toggle go through.
   if (chrome::IsRunningInAppMode() && window_->IsFullscreen())
     return;
 
+#if !defined(OS_MACOSX)
+  // Do not enter fullscreen mode if disallowed by pref.

[scheib, 2013/08/22 23:57:26]

Have you tested this in combination with kiosk mode? Please add comments here
explaining now they mix (or don't mix). Add explanation elsewhere also (e.g.
when exposing preferences) if they don't mix.

[bartfab (slow), 2013/08/23 11:54:21]

Added documentation here, in pref_names.cc and policy_templates.json.

On desktop platforms, disabling fullscreen makes kiosk mode unavailable. On
Chrome OS, disabling fullscreen has no impact on kiosk mode. (This is because
desktop kiosk mode and Chrome OS kiosk mode are entirely unrelated features that
unfortunately happen to share the same name.)

+  if (enter_fullscreen &&
+      !profile_->GetPrefs()->GetBoolean(prefs::kFullscreenAllowed)) {
+    return;
+  }
+#endif
+
   if (enter_fullscreen)
     EnterFullscreenModeInternal(option);
   else
     ExitFullscreenModeInternal();
 }
 
 void FullscreenController::EnterFullscreenModeInternal(
     FullscreenInternalOption option) {
   toggled_into_fullscreen_ = true;
   GURL url;
@@ skipping 88 matching lines @@
 
 ContentSetting
 FullscreenController::GetMouseLockSetting(const GURL& url) const {
   if (url.SchemeIsFile())
     return CONTENT_SETTING_ALLOW;
 
   HostContentSettingsMap* settings_map = profile_->GetHostContentSettingsMap();
   return settings_map->GetContentSetting(url, url,
       CONTENT_SETTINGS_TYPE_MOUSELOCK, std::string());
 }