Add frameless for ShellWindow on gtk.

chrome/browser/ui/cocoa/extensions/shell_window_cocoa.mm

 // 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/cocoa/extensions/shell_window_cocoa.h"
 
 #include "base/mac/mac_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/cocoa/browser_window_utils.h"
@@ skipping 75 matching lines @@
                                    const extensions::Extension* extension,
                                    const GURL& url,
                                    const ShellWindow::CreateParams& params)
     : ShellWindow(profile, extension, url),
       attention_request_id_(0) {
   // Flip coordinates based on the primary screen.
   NSRect main_screen_rect = [[[NSScreen screens] objectAtIndex:0] frame];
   NSRect cocoa_bounds = NSMakeRect(params.bounds.x(),
       NSHeight(main_screen_rect) - params.bounds.y() - params.bounds.height(),
       params.bounds.width(), params.bounds.height());
-  NSUInteger style_mask = NSTitledWindowMask | NSClosableWindowMask |
-                          NSMiniaturizableWindowMask | NSResizableWindowMask |
-                          NSTexturedBackgroundWindowMask;
+  NSUInteger style_mask = NSTexturedBackgroundWindowMask;
+  // Hide titlebar when {frame: 'none'} on ShellWindow.

[jeremy, 2012/08/05 08:04:21]

nit: on -> specified on

+  if (params.frame == ShellWindow::CreateParams::FRAME_NONE)
+    style_mask |= NSBorderlessWindowMask;
+  else
+    style_mask |= NSTitledWindowMask | NSClosableWindowMask |
+                  NSMiniaturizableWindowMask | NSResizableWindowMask;
   scoped_nsobject<NSWindow> window([[ShellNSWindow alloc]
       initWithContentRect:cocoa_bounds
                 styleMask:style_mask
                   backing:NSBackingStoreBuffered
                     defer:NO]);
   [window setTitle:base::SysUTF8ToNSString(extension->name())];
   gfx::Size min_size = params.minimum_size;
   if (min_size.width() || min_size.height()) {
     [window setContentMinSize:NSMakeSize(min_size.width(), min_size.height())];
   }
@@ skipping 215 matching lines @@
   return [window_controller_ window];
 }
 
 // static
 ShellWindow* ShellWindow::CreateImpl(Profile* profile,
                                      const extensions::Extension* extension,
                                      const GURL& url,
                                      const ShellWindow::CreateParams& params) {
   return new ShellWindowCocoa(profile, extension, url, params);
 }