Use BubbleWindow for ChromeOS windows/dialogs.

chrome/browser/views/window.cc

+// Copyright (c) 2010 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/views/window.h"
+
+#include "gfx/rect.h"
+#include "views/window/window.h"
+
+#if defined(OS_CHROMEOS)
+#include "chrome/browser/chromeos/frame/bubble_window.h"
+#endif  // defined(OS_CHROMEOS)
+
+namespace browser {
+
+views::Window* CreateViewsWindow(gfx::NativeWindow parent,
+                                 const gfx::Rect& bounds,
+                                 views::WindowDelegate* delegate) {
+#if defined(OS_CHROMEOS)
+  return chromeos::BubbleWindow::Create(parent, gfx::Rect(), delegate);
+#else
+  return views::Window::CreateChromeWindow(parent, gfx::Rect(), delegate);
+#endif
+}
+
+}  // namespace browser