Remove deprecated window.showModalDialog()

public/web/WebWidgetClient.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 102 matching lines @@
     // Called when the cursor for the widget changes.
     virtual void didChangeCursor(const WebCursorInfo&) { }
 
     // Called when the widget should be closed.  WebWidget::close() should
     // be called asynchronously as a result of this notification.
     virtual void closeWidgetSoon() { }
 
     // Called to show the widget according to the given policy.
     virtual void show(WebNavigationPolicy) { }
 
-    // Called to block execution of the current thread until the widget is
-    // closed.
-    virtual void runModal() { }
-
     // Called to enter/exit fullscreen mode. If enterFullScreen returns true,
     // then WebWidget::{will,Did}EnterFullScreen should bound resizing the
     // WebWidget into fullscreen mode. Similarly, when exitFullScreen is
     // called, WebWidget::{will,Did}ExitFullScreen should bound resizing the
     // WebWidget out of fullscreen mode.
     virtual bool enterFullScreen() { return false; }
     virtual void exitFullScreen() { }
 
     // Called to get/set the position of the widget in screen coordinates.
     virtual WebRect windowRect() { return WebRect(); }
@@ skipping 45 matching lines @@
     // of the touch actions that are permitted for this touch.
     virtual void setTouchAction(WebTouchAction touchAction) { }
 
 protected:
     ~WebWidgetClient() { }
 };
 
 } // namespace blink
 
 #endif