[api] Prototype WeakRef implementation

src/inspector/injected-script-source.js

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * Copyright (C) 2013 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 880 matching lines @@
                     value: rawInternalProperties[i + 1],
                     isOwn: true,
                     enumerable: true,
                     __proto__: null
                 };
                 if (!addPropertyIfNeeded(descriptors, internalPropertyDescriptor))
                     break;
             }
             this._appendPropertyPreviewDescriptors(preview, descriptors, secondLevelKeys, isTable);
 
-            if (subtype === "map" || subtype === "set" || subtype === "weakmap" || subtype === "weakset" || subtype === "iterator")
+            if (subtype === "map" || subtype === "set" || subtype === "weakmap" || subtype === "weakset" || subtype === "weakref" || subtype === "iterator")
                 this._appendEntriesPreview(entries, preview, skipEntriesPreview);
 
         } catch (e) {}
 
         return preview;
 
         /**
          * @param {!Array<!Object>} descriptors
          * @param {!Object} descriptor
          * @return {boolean}
@@ skipping 155 matching lines @@
             return string.substr(0, leftHalf) + "\u2026" + string.substr(string.length - rightHalf, rightHalf);
         }
         return string.substr(0, maxLength) + "\u2026";
     },
 
     __proto__: null
 }
 
 return injectedScript;
 })