Re-land of Use parenthesis in descriptions for array/map/set lengths/sizes

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 611 matching lines @@
             }
             return description;
         }
 
         if (subtype === "proxy")
             return "Proxy";
 
         var className = InjectedScriptHost.internalConstructorName(obj);
         if (subtype === "array" || subtype === "typedarray") {
             if (typeof obj.length === "number")
-                className += "[" + obj.length + "]";
+                return className + "(" + obj.length + ")";
             return className;
         }
 
+        if (subtype === "map" || subtype === "set") {
+            if (typeof obj.size === "number")
+                return className + "(" + obj.size + ")";
+            return className;
+        }
+
         if (typeof obj === "function")
             return toString(obj);
 
         if (isSymbol(obj)) {
             try {
                 // It isn't safe, because Symbol.prototype.toString can be overriden.
                 return /* suppressBlacklist */ obj.toString() || "Symbol";
             } catch (e) {
                 return "Symbol";
             }
@@ skipping 421 matching lines @@
             return string.substr(0, leftHalf) + "\u2026" + string.substr(string.length - rightHalf, rightHalf);
         }
         return string.substr(0, maxLength) + "\u2026";
     },
 
     __proto__: null
 }
 
 return injectedScript;
 })