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

src/inspector/injected-script-source.js

Index: src/inspector/injected-script-source.js
diff --git a/src/inspector/injected-script-source.js b/src/inspector/injected-script-source.js
index 39c6c9c1e84b0d461a415ab5f9a6d6ec2588f1a2..a83b10926a268d096f926ec696a3275236ae8e15 100644
--- a/src/inspector/injected-script-source.js
+++ b/src/inspector/injected-script-source.js
@@ -629,7 +629,13 @@ InjectedScript.prototype = {
         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;
         }