cros: Trigger immersive mode with F4 maximize key

chrome/browser/ui/ash/chrome_shell_delegate.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/ash/chrome_shell_delegate.h"
 
 #include "ash/host/root_window_host_factory.h"
 #include "ash/launcher/launcher_types.h"
 #include "ash/magnifier/magnifier_constants.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/wm/stacking_controller.h"
+#include "ash/wm/window_properties.h"
 #include "ash/wm/window_util.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "chrome/browser/chromeos/accessibility/magnification_manager.h"
 #include "chrome/browser/chromeos/login/screen_locker.h"
 #include "chrome/browser/extensions/api/terminal/terminal_extension_helper.h"
 #include "chrome/browser/lifetime/application_lifetime.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/sessions/tab_restore_service.h"
@@ skipping 178 matching lines @@
 void ChromeShellDelegate::ToggleMaximized() {
   aura::Window* window = ash::wm::GetActiveWindow();
   if (!window)
     return;
   // Get out of fullscreen when in fullscreen mode.
   if (ash::wm::IsWindowFullscreen(window)) {
     chrome::ToggleFullscreenMode(GetTargetBrowser());
     return;
   }
   ash::wm::ToggleMaximizedWindow(window);
+  // Experiment with automatically entering immersive mode when the user presses
+  // the F4 maximize key.
+  window->SetProperty(ash::internal::kImmersiveModeKey,
+                      ash::wm::IsWindowMaximized(window));
 }
 
 void ChromeShellDelegate::OpenFileManager() {
 #if defined(OS_CHROMEOS)
   Browser* browser =
       chrome::FindBrowserWithWindow(ash::wm::GetActiveWindow());
   // Open the select file dialog only if there is an active browser where the
   // selected file is displayed.
   if (browser) {
     browser->OpenFile();
@@ skipping 357 matching lines @@
       ash::Shell::GetInstance()->ShowLauncher();
       break;
     default:
       NOTREACHED() << "Unexpected notification " << type;
   }
 #else
   // MSVC++ warns about switch statements without any cases.
   NOTREACHED() << "Unexpected notification " << type;
 #endif
 }