Add frameless for ShellWindow on gtk.

chrome/browser/ui/gtk/extensions/shell_window_gtk.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/gtk/extensions/shell_window_gtk.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/extension.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host_view.h"
@@ skipping 12 matching lines @@
       content_thinks_its_fullscreen_(false) {
   window_ = GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL));
 
   gfx::NativeView native_view =
       web_contents()->GetView()->GetNativeView();
   gtk_container_add(GTK_CONTAINER(window_), native_view);
 
   gtk_window_set_default_size(
       window_, params.bounds.width(), params.bounds.height());
 
+  // Hide titlebar when {frame: 'none'} specified on ShellWindow.
+  if (params.frame == ShellWindow::CreateParams::FRAME_NONE)
+    gtk_window_set_decorated(window_, false);
+
   int min_width = params.minimum_size.width();
   int min_height = params.minimum_size.height();
   int max_width = params.maximum_size.width();
   int max_height = params.maximum_size.height();
   GdkGeometry hints;
   int hints_mask = 0;
   if (min_width || min_height) {
     hints.min_height = min_height;
     hints.min_width = min_width;
     hints_mask |= GDK_HINT_MIN_SIZE;
@@ skipping 177 matching lines @@
   return content_thinks_its_fullscreen_;
 }
 
 // static
 ShellWindow* ShellWindow::CreateImpl(Profile* profile,
                                      const extensions::Extension* extension,
                                      const GURL& url,
                                      const ShellWindow::CreateParams& params) {
   return new ShellWindowGtk(profile, extension, url, params);
 }