DevTools: Decouple shortcuts from actions, introduce shortcut contexts

Source/devtools/front_end/utilities.js

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2012 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 1096 matching lines @@
  * @constructor
  * @template T
  */
 var Set = function()
 {
     /** @type {!Object.<string, !T>} */
     this._set = {};
     this._size = 0;
 }
 
+/**
+ * @param {!Array.<!T>} array
+ * @return {!Set.<T>}
+ * @template T
+ */
+Set.fromArray = function(array)
+{
+    var result = new Set();
+    array.forEach(function(item) { result.add(item); });
+    return result;
+}
+
 Set.prototype = {
     /**
      * @param {!T} item
      */
     add: function(item)
     {
         var objectIdentifier = item.__identifier;
         if (!objectIdentifier) {
             objectIdentifier = createObjectIdentifier();
             item.__identifier = objectIdentifier;
@@ skipping 26 matching lines @@
         var i = 0;
         for (var objectIdentifier in this._set)
             result[i++] = this._set[objectIdentifier];
         return result;
     },
 
     /**
      * @param {!T} item
      * @return {boolean}
      */
-    hasItem: function(item)
+    contains: function(item)
     {
         return !!this._set[item.__identifier];
     },
 
     /**
      * @return {number}
      */
     size: function()
     {
         return this._size;
@@ skipping 273 matching lines @@
  * @constructor
  */
 var StringSet = function()
 {
     /** @type {!StringMap.<boolean>} */
     this._map = new StringMap();
 }
 
 /**
  * @param {!Array.<string>} array
+ * @return {!StringSet}
  */
 StringSet.fromArray = function(array)
 {
     var result = new StringSet();
     array.forEach(function(item) { result.add(item); });
     return result;
 }
 
 StringSet.prototype = {
     /**
@@ skipping 157 matching lines @@
             this._outgoingCallback();
     }
 }
 
 /**
  * @param {*} value
  */
 function suppressUnused(value)
 {
 }