DevTools: Implement extensions-based shortcut bindings

Source/devtools/front_end/ModuleManager.js

 /*
  * 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 382 matching lines @@
         revealer.reveal(revealable, lineNumber);
 }
 
 WebInspector.Revealer.prototype = {
     /**
      * @param {!Object} object
      */
     reveal: function(object) {}
 }
 
+/**
+ * @interface
+ */
+WebInspector.ActionDelegate = function()
+{
+}
+
+WebInspector.ActionDelegate.prototype = {
+    /**
+     * @param {!KeyboardEvent=} keyEvent
+     * @return {boolean}
+     */
+    handleAction: function(keyEvent) {}
+}
+
 WebInspector.moduleManager = new WebInspector.ModuleManager(allDescriptors);