DevTools: expect length/size hints in descriptions with parenthesis

third_party/WebKit/Source/devtools/front_end/sdk/RemoteObject.js

Index: third_party/WebKit/Source/devtools/front_end/sdk/RemoteObject.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/RemoteObject.js b/third_party/WebKit/Source/devtools/front_end/sdk/RemoteObject.js
index 586b9c40088afa8e4d04e40dbb6839f023cd5e3a..df07d56fb9ff9f543e1b2b349cc30c23e0ad89e8 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/RemoteObject.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/RemoteObject.js
@@ -70,7 +70,7 @@ SDK.RemoteObject = class {
   static arrayLength(object) {
     if (object.subtype !== 'array' && object.subtype !== 'typedarray')
       return 0;
-    var matches = object.description.match(/\[([0-9]+)\]/);
+    var matches = object.description.match(/\[([0-9]+)\]/) || object.description.match(/\(([0-9]+)\)/);
     if (!matches)
       return 0;
     return parseInt(matches[1], 10);