Add flag to enable immersive fullscreen for v2 apps

chrome/browser/ui/gtk/apps/native_app_window_gtk.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 "chrome/browser/ui/gtk/apps/native_app_window_gtk.h"
 
 #include <gdk/gdkx.h>
 #include <vector>
 
 #include "base/message_loop/message_pump_gtk.h"
@@ skipping 575 matching lines @@
     if (has_hit_titlebar || has_hit_edge)
       gdk_window_lower(gdk_window);
     return TRUE;
   }
 
   return FALSE;
 }
 
 // NativeAppWindow implementation:
 
-void NativeAppWindowGtk::SetFullscreen(bool fullscreen) {
+void NativeAppWindowGtk::SetFullscreen(int fullscreen_types) {
+  bool fullscreen = (fullscreen_types != ShellWindow::FULLSCREEN_TYPE_NONE);
   content_thinks_its_fullscreen_ = fullscreen;
-  if (fullscreen){
+  if (fullscreen) {
     if (resizable_) {
       gtk_window_fullscreen(window_);
     } else {
       // We must first make the window resizable. That won't take effect
       // immediately, so OnConfigureDebounced completes the fullscreen call.
       gtk_window_set_resizable(window_, TRUE);
     }
   } else {
     gtk_window_unfullscreen(window_);
     if (!resizable_)
@@ skipping 102 matching lines @@
     hints_mask |= GDK_HINT_MAX_SIZE;
   }
   if (hints_mask) {
     gtk_window_set_geometry_hints(
         window_,
         GTK_WIDGET(window_),
         &hints,
         static_cast<GdkWindowHints>(hints_mask));
   }
 }