Revert of Remove DialogDelegate::OnClosed() which is redundant with

chrome/browser/ui/views/sync/profile_signin_confirmation_dialog_views.cc

 // Copyright 2013 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/sync/profile_signin_confirmation_dialog_views.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 116 matching lines @@
 }
 
 bool ProfileSigninConfirmationDialogViews::Cancel() {
   if (delegate_) {
     delegate_->OnCancelSignin();
     delegate_ = NULL;
   }
   return true;
 }
 
+void ProfileSigninConfirmationDialogViews::OnClosed() {
+  Cancel();
+}
+
 ui::ModalType ProfileSigninConfirmationDialogViews::GetModalType() const {
   return ui::MODAL_TYPE_WINDOW;
 }
 
 void ProfileSigninConfirmationDialogViews::ViewHierarchyChanged(
     const ViewHierarchyChangedDetails& details) {
   views::DialogDelegateView::ViewHierarchyChanged(details);
   if (!details.is_add || details.child != this)
     return;
 
@@ skipping 72 matching lines @@
       views::GridLayout::USE_PREF, 0, 0);
   explanation_columns->AddPaddingColumn(0.0, views::kButtonHEdgeMarginNew);
   dialog_layout->StartRow(0, 1);
   const int kPreferredWidth = 440;
   dialog_layout->AddView(
       explanation_label_, 1, 1,
       views::GridLayout::FILL, views::GridLayout::FILL,
       kPreferredWidth, explanation_label_->GetHeightForWidth(kPreferredWidth));
 }
 
-void ProfileSigninConfirmationDialogViews::WindowClosing() {
-  Cancel();
-}
-
 void ProfileSigninConfirmationDialogViews::StyledLabelLinkClicked(
     views::StyledLabel* label,
     const gfx::Range& range,
     int event_flags) {
   chrome::NavigateParams params(
       browser_,
       GURL("https://support.google.com/chromebook/answer/1331549"),
       ui::PAGE_TRANSITION_LINK);
   params.disposition = NEW_POPUP;
   params.window_action = chrome::NavigateParams::SHOW_WINDOW;
   chrome::Navigate(&params);
 }
 
 void ProfileSigninConfirmationDialogViews::ButtonPressed(
     views::Button* sender,
     const ui::Event& event) {
   DCHECK(prompt_for_new_profile_);
   DCHECK_EQ(continue_signin_button_, sender);
   if (delegate_) {
     delegate_->OnContinueSignin();
     delegate_ = NULL;
   }
   GetWidget()->Close();
 }