Allow about:tracing Counters to be selected

chrome/browser/resources/tracing/test_utils.js

 // Copyright (c) 2012 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.
 
 /**
  * @fileoverview Helper functions for use in tracing tests.
  */
 
 
 /**
@@ skipping 38 matching lines @@
     s.startThread = startThread;
     s.endThread = endThread;
     var subSlice = new tracing.TimelineAsyncSlice(name, 0, start);
     subSlice.duration = duration;
     subSlice.startThread = startThread;
     subSlice.endThread = endThread;
     s.subSlices = [subSlice];
     return s;
   }
 
+  function assertArrayishEquals(ref, val) {
+    assertEquals(ref.length, val.length);
+    for (var i = 0; i < ref.length; i++)
+      assertEquals(ref[i], val[i]);
+  }
+
+
   return {
     getAsync: getAsync,
     newAsyncSlice: newAsyncSlice,
-    newAsyncSliceNamed: newAsyncSliceNamed
+    newAsyncSliceNamed: newAsyncSliceNamed,
+    assertArrayishEquals: assertArrayishEquals
   };
 });