Enable new dialog style transparency with Views Textfields.

ui/views/window/dialog_delegate.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 "ui/views/window/dialog_delegate.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "grit/ui_strings.h"
 #include "ui/base/l10n/l10n_util.h"
@@ skipping 14 matching lines @@
 namespace {
 
 // Create a widget to host the dialog.
 Widget* CreateDialogWidgetImpl(DialogDelegateView* dialog_delegate_view,
                                gfx::NativeWindow context,
                                gfx::NativeWindow parent) {
   views::Widget* widget = new views::Widget;
   views::Widget::InitParams params;
   params.delegate = dialog_delegate_view;
   if (DialogDelegate::UseNewStyle()) {
-    // TODO(msw): Avoid Windows native controls or support dialog transparency
-    //            with a separate border Widget, like BubbleDelegateView.
-    params.transparent = views::View::get_use_acceleration_when_possible();
+    // Note: Transparent widgets cannot host native Windows textfield controls.
+    params.transparent = true;
     params.remove_standard_frame = true;
   }
   params.context = context;
   params.parent = parent;
   params.top_level = true;
   widget->Init(params);
   if (DialogDelegate::UseNewStyle()) {
 #if defined(USE_AURA)
     // TODO(msw): Add a matching shadow type and remove the bubble frame border?
     corewm::SetShadowType(widget->GetNativeWindow(), corewm::SHADOW_TYPE_NONE);
@@ skipping 161 matching lines @@
 
 const Widget* DialogDelegateView::GetWidget() const {
   return View::GetWidget();
 }
 
 View* DialogDelegateView::GetContentsView() {
   return this;
 }
 
 }  // namespace views