Switch GlobalErrorBubbleView to a BubbleDialogDelegate.

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 <utility>
 
 #include "base/logging.h"
 #include "build/build_config.h"
@@ skipping 95 matching lines @@
 
 bool DialogDelegate::Close() {
   int buttons = GetDialogButtons();
   if ((buttons & ui::DIALOG_BUTTON_CANCEL) ||
       (buttons == ui::DIALOG_BUTTON_NONE)) {
     return Cancel();
   }
   return Accept();
 }
 
+void DialogDelegate::UpdateButton(LabelButton* button, ui::DialogButton type) {
+  button->SetText(GetDialogButtonLabel(type));
+  button->SetEnabled(IsDialogButtonEnabled(type));
+  button->SetIsDefault(type == GetDefaultDialogButton());
+}
+
 base::string16 DialogDelegate::GetDialogTitle() const {
   return GetWindowTitle();
 }
 
 int DialogDelegate::GetDialogButtons() const {
   return ui::DIALOG_BUTTON_OK | ui::DIALOG_BUTTON_CANCEL;
 }
 
 int DialogDelegate::GetDefaultDialogButton() const {
   if (GetDialogButtons() & ui::DIALOG_BUTTON_OK)
@@ skipping 122 matching lines @@
   state->role = ui::AX_ROLE_DIALOG;
 }
 
 void DialogDelegateView::ViewHierarchyChanged(
     const ViewHierarchyChangedDetails& details) {
   if (details.is_add && details.child == this && GetWidget())
     NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
 }
 
 }  // namespace views