DevTools: Implement batch event forwarding from extension panels

Source/devtools/front_end/KeyboardShortcut.js

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 129 matching lines @@
 {
     var modifiers = WebInspector.KeyboardShortcut.Modifiers.None;
     if (keyboardEvent.shiftKey)
         modifiers |= WebInspector.KeyboardShortcut.Modifiers.Shift;
     if (keyboardEvent.ctrlKey)
         modifiers |= WebInspector.KeyboardShortcut.Modifiers.Ctrl;
     if (keyboardEvent.altKey)
         modifiers |= WebInspector.KeyboardShortcut.Modifiers.Alt;
     if (keyboardEvent.metaKey)
         modifiers |= WebInspector.KeyboardShortcut.Modifiers.Meta;
-    return WebInspector.KeyboardShortcut._makeKeyFromCodeAndModifiers(keyboardEvent.keyCode, modifiers);
+
+    function keyCodeForEvent(keyboardEvent)
+    {
+        // Use either a real or a synthetic keyCode (for events originating from extensions).
+        return keyboardEvent.keyCode || keyboardEvent["__keyCode"];
+    }
+    return WebInspector.KeyboardShortcut._makeKeyFromCodeAndModifiers(keyCodeForEvent(keyboardEvent), modifiers);
 }
 
 /**
  * @param {?KeyboardEvent} event
  * @return {boolean}
  */
 WebInspector.KeyboardShortcut.eventHasCtrlOrMeta = function(event)
 {
     return WebInspector.isMac() ? event.metaKey && !event.ctrlKey : event.ctrlKey && !event.metaKey;
 }
@@ skipping 194 matching lines @@
         if (!platformsString)
             return true;
         var platforms = platformsString.split(",");
         var isMatch = false;
         var currentPlatform = WebInspector.platform();
         for (var i = 0; !isMatch && i < platforms.length; ++i)
             isMatch = platforms[i] === currentPlatform;
         return isMatch;
     }
 }