[DevTools] Fix more frontend compiler errors

third_party/WebKit/Source/devtools/front_end/sources/SourceMapNamesResolver.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 WebInspector.SourceMapNamesResolver = {};
 
 WebInspector.SourceMapNamesResolver._cachedMapSymbol = Symbol("cache");
 WebInspector.SourceMapNamesResolver._cachedPromiseSymbol = Symbol("cache");
 
 /**
@@ skipping 64 matching lines @@
             if (isFunction(node))
                 functionDeclarationCounter++;
 
             if (functionDeclarationCounter > 1)
                 return;
 
             if (isFunction(node) && node.params)
                 identifiers.pushAll(node.params);
 
             if (node.type === "VariableDeclarator")
-                identifiers.push(node.id);
+                identifiers.push(/** @type {!ESTree.Node} */(node.id));
         }
 
         /**
          * @param {!ESTree.Node} node
          */
         function afterVisit(node)
         {
             if (isFunction(node))
                 functionDeclarationCounter--;
         }
@@ skipping 275 matching lines @@
     /**
      * @override
      * @param {function(?Array<!DebuggerAgent.CollectionEntry>)} callback
      */
     collectionEntries: function(callback)
     {
         this._object.collectionEntries(callback);
     },
 
     __proto__: WebInspector.RemoteObject.prototype
-}
+}