DevTools: teach SourceMapNamesResolver to resolve "this" object

third_party/WebKit/Source/devtools/front_end/platform/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 1263 matching lines @@
 
 /**
  * @return {!Array<!KEY>}
  */
 Map.prototype.keysArray = function()
 {
     return Array.from(this.keys());
 }
 
 /**
+ * @return {!Multimap<!KEY, !VALUE>}
+ */
+Map.prototype.inverse = function()
+{
+    var result = new Multimap();
+    for (var key of this.keys()) {
+        var value = this.get(key);
+        result.set(value, key);
+    }
+    return result;
+}
+
+/**
  * @constructor
  * @template K, V
  */
 var Multimap = function()
 {
     /** @type {!Map.<K, !Set.<!V>>} */
     this._map = new Map();
 }
 
 Multimap.prototype = {
@@ skipping 229 matching lines @@
  * @param {T} defaultValue
  * @return {!Promise.<T>}
  * @template T
  */
 Promise.prototype.catchException = function(defaultValue) {
     return this.catch(function (error) {
         console.error(error);
         return defaultValue;
     });
 }