Add policy for fullscreen mode; disallow fullscreen in public sessions

apps/shell_window.cc

 // Copyright 2013 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 "apps/shell_window.h"
 
 #include "apps/native_app_window.h"
 #include "apps/shell_window_geometry_cache.h"
 #include "apps/shell_window_registry.h"
 #include "base/strings/string_util.h"
@@ skipping 19 matching lines @@
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/resource_dispatcher_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/media_stream_request.h"
 #include "extensions/browser/view_type_utils.h"
 #include "skia/ext/image_operations.h"
 #include "third_party/skia/include/core/SkRegion.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/screen.h"
 
+#if !defined(OS_MACOSX)
+#include "apps/pref_names.h"
+#include "base/prefs/pref_service.h"
+#endif
+
 using content::ConsoleMessageLevel;
 using content::WebContents;
 using extensions::APIPermission;
 using web_modal::WebContentsModalDialogHost;
 using web_modal::WebContentsModalDialogManager;
 
 namespace {
 const int kDefaultWidth = 512;
 const int kDefaultHeight = 384;
 
@@ skipping 437 matching lines @@
 void ShellWindow::NavigationStateChanged(
     const content::WebContents* source, unsigned changed_flags) {
   if (changed_flags & content::INVALIDATE_TYPE_TITLE)
     native_app_window_->UpdateWindowTitle();
   else if (changed_flags & content::INVALIDATE_TYPE_TAB)
     native_app_window_->UpdateWindowIcon();
 }
 
 void ShellWindow::ToggleFullscreenModeForTab(content::WebContents* source,
                                              bool enter_fullscreen) {
+#if !defined(OS_MACOSX)
+  // Do not enter fullscreen mode if disallowed by pref.
+  // TODO(bartfab): Add a test once it becomes possible to simulate a user
+  // gesture. http://crbug.com/174178
+  if (enter_fullscreen &&
+      !profile()->GetPrefs()->GetBoolean(prefs::kAppFullscreenAllowed)) {
+    return;
+  }
+#endif
+
   if (!IsExtensionWithPermissionOrSuggestInConsole(
       APIPermission::kFullscreen,
       extension_,
       source->GetRenderViewHost())) {
     return;
   }
 
   fullscreen_for_tab_ = enter_fullscreen;
 
   if (enter_fullscreen) {
@@ skipping 123 matching lines @@
         region.bounds.x(),
         region.bounds.y(),
         region.bounds.right(),
         region.bounds.bottom(),
         region.draggable ? SkRegion::kUnion_Op : SkRegion::kDifference_Op);
   }
   return sk_region;
 }
 
 }  // namespace apps