Remove DialogDelegate::Accept() variant

ui/views/window/dialog_delegate.h

 // 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.
 
 #ifndef UI_VIEWS_WINDOW_DIALOG_DELEGATE_H_
 #define UI_VIEWS_WINDOW_DIALOG_DELEGATE_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
@@ skipping 53 matching lines @@
   // this is called when the user presses the "Cancel" button or the Esc key.
   // It can also be called on a close action if |Close| has not been
   // overridden. This function should return true if the window can be closed
   // after it returns, or false if it must remain open.
   virtual bool Cancel();
 
   // For Dialog boxes, this is called when the user presses the "OK" button,
   // or the Enter key. It can also be called on a close action if |Close|
   // has not been overridden. This function should return true if the window
   // can be closed after it returns, or false if it must remain open.
-  // If |window_closing| is true, it means that this handler is
-  // being called because the window is being closed (e.g.  by Window::Close)
-  // and there is no Cancel handler, so Accept is being called instead.
-  virtual bool Accept(bool window_closing);
   virtual bool Accept();
 
   // Called when the user closes the window without selecting an option,
   // e.g. by pressing the close button on the window or using a window manager
   // gesture. By default, this calls Accept() if the only button in the dialog
   // is Accept, Cancel() otherwise. This function should return true if the
   // window can be closed after it returns, or false if it must remain open.
   virtual bool Close();
 
   // Overridden from ui::DialogModel:
@@ skipping 51 matching lines @@
   void ViewHierarchyChanged(
       const ViewHierarchyChangedDetails& details) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DialogDelegateView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WINDOW_DIALOG_DELEGATE_H_