Fix the white flicker of the keyboard overlay when it first appearing.

chrome/browser/ui/views/keyboard_overlay_dialog_view.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/views/keyboard_overlay_dialog_view.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser_dialogs.h"
@@ skipping 32 matching lines @@
 #if defined(OS_CHROMEOS)
   // Temporarily disable all accelerators for IME switching including Shift+Alt
   // since the user might press Shift+Alt to remember an accelerator that starts
   // with Shift+Alt (e.g. Shift+Alt+Tab for moving focus backwards).
   chromeos::input_method::InputMethodManager::GetInstance()->DisableHotkeys();
 #endif
   KeyboardOverlayDelegate* delegate = new KeyboardOverlayDelegate(
       l10n_util::GetStringUTF16(IDS_KEYBOARD_OVERLAY_TITLE));
   KeyboardOverlayDialogView* view = new KeyboardOverlayDialogView(
       ProfileManager::GetDefaultProfileOrOffTheRecord(), delegate);
-  delegate->set_view(view);
-
-  views::Widget* widget = new views::Widget;
-  views::Widget::InitParams params(
-      views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
-  params.delegate = view;
-  widget->Init(params);
-
-  // Show the widget at the bottom of the work area.
-  gfx::Size size;
-  delegate->GetDialogSize(&size);
-  gfx::Rect rect = gfx::Screen::GetMonitorNearestWindow(
-      view->GetWidget()->GetNativeView()).work_area();
-  gfx::Rect bounds((rect.width() - size.width()) / 2,
-                   rect.height() - size.height(),
-                   size.width(),
-                   size.height());
-  view->GetWidget()->SetBounds(bounds);
-  view->GetWidget()->Show();
+  delegate->Show(view);
 
   g_instance = view;
 }
 
 void KeyboardOverlayDialogView::WindowClosing() {
 #if defined(OS_CHROMEOS)
   // Re-enable the IME accelerators. See the comment in ShowDialog() above.
   chromeos::input_method::InputMethodManager::GetInstance()->EnableHotkeys();
 #endif
   g_instance = NULL;
 }