[DevTools] Add notifyPopupOpeningObservers call before running debug loop

third_party/WebKit/Source/web/WebFrameWidgetImpl.h

 /*
  * Copyright (C) 2014 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 128 matching lines @@
     void sendResizeEventAndRepaint();
 
     void updateMainFrameLayoutSize();
 
     void setIgnoreInputEvents(bool newValue);
 
     // Returns the page object associated with this widget. This may be null when
     // the page is shutting down, but will be valid at all other times.
     Page* page() const { return view()->page(); }
 
+    ChromeClientImpl& chromeClient() const { return view()->chromeClient(); }
+
     // Event related methods:
     void mouseContextMenu(const WebMouseEvent&);
 
     WebLayerTreeView* layerTreeView() const { return m_layerTreeView; }
 
     // Returns true if the event leads to scrolling.
     static bool mapKeyCodeForScroll(
         int keyCode,
         ScrollDirection*,
         ScrollGranularity*);
@@ skipping 64 matching lines @@
     WebColor m_baseBackgroundColor;
 
     SelfKeepAlive<WebFrameWidgetImpl> m_selfKeepAlive;
 };
 
 DEFINE_TYPE_CASTS(WebFrameWidgetImpl, WebFrameWidget, widget, widget->forSubframe(), widget.forSubframe());
 
 } // namespace blink
 
 #endif