Enable KeyboardOverlayDialog on aura.

chrome/browser/ui/views/window.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_WINDOW_H_
 #define CHROME_BROWSER_UI_VIEWS_WINDOW_H_
 #pragma once
 
 #include "chrome/browser/ui/dialog_style.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace views {
 class BubbleDelegateView;
 class Widget;
 class WidgetDelegate;
 }
 
 namespace browser {
 
 // Create a window for given |delegate| using default frame view.
 views::Widget* CreateViewsWindow(gfx::NativeWindow parent,
                                  views::WidgetDelegate* delegate,
                                  DialogStyle style);
 
+// Create a frameless window for given |delegate|.
+views::Widget* CreateFramelessViewsWindow(gfx::NativeWindow parent,
+                                          views::WidgetDelegate* delegate);

[jennyz, 2012/01/27 23:17:48]

I am not sure if KeyboardOverlayDialog is the only dialog that should be
borderless on aura, therefore, I create a separate API
browser::CreateFramelessViewsWindow(). If we should make all dialogs with
STYLE_FLUSH to be borderless, then I can merge the code into
browser::CreateViewsWindow().

+
 // Create a bubble for a given |delegate|. Takes care of chromeos
 // specific window type setting if needed.
 views::Widget* CreateViewsBubble(views::BubbleDelegateView* delegate);
 
 // Create a bubble that will show even when chromeos screen is locked,
 // for a given |delegate|. Takes care of chromeos specific window
 // type setting. For bubbles that do not need to be shown when screen
 // is locked, use CreateViewsBubble instead.
 views::Widget* CreateViewsBubbleAboveLockScreen(
     views::BubbleDelegateView* delegate);
 
 }  // namespace browser
 
 #endif  // CHROME_BROWSER_UI_VIEWS_WINDOW_H_