DevTools: throttle calls to ToolbarMenuButton.trigger() to avoid bad context menu state on Mac

third_party/WebKit/Source/devtools/front_end/ui/Toolbar.js

 /*
  * 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 639 matching lines @@
 
     if (!this._triggerTimeout)
       this._triggerTimeout = setTimeout(this._trigger.bind(this, event), 200);
   }
 
   /**
    * @param {!Event} event
    */
   _trigger(event) {
     delete this._triggerTimeout;
+
+    // Throttling avoids entering a bad state on Macs when rapidly triggering context menus just
+    // after the window gains focus. See crbug.com/655556
+    if (this._lastTriggerTime && Date.now() - this._lastTriggerTime < 300)
+      return;
     var contextMenu = new WebInspector.ContextMenu(
         event, this._useSoftMenu, this.element.totalOffsetLeft(),
         this.element.totalOffsetTop() + this.element.offsetHeight);
     this._contextMenuHandler(contextMenu);
     contextMenu.show();
+    this._lastTriggerTime = Date.now();
   }
 
   /**
    * @override
    * @param {!Event} event
    */
   _clicked(event) {
     if (!this._triggerTimeout)
       return;
     clearTimeout(this._triggerTimeout);
@@ skipping 220 matching lines @@
     return this.inputElement.checked;
   }
 
   /**
    * @param {boolean} value
    */
   setChecked(value) {
     this.inputElement.checked = value;
   }
 };