Increase list size to improve test focus on metric being measured.

BUG=509849

Review URL: https://codereview.chromium.org/1231863009

git-svn-id: svn://svn.chromium.org/blink/trunk@198939 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/PerformanceTests/ShadowDOM/shadow-style-share-with-distribution.html

@@ -10,7 +10,7 @@
 </style>
 <script src="../resources/runner.js"></script>
 <script>
-  var listSize = 100;
+  var listSize = 1000;
   window.onload = function() {
     var root = document.querySelector('#list').createShadowRoot();
     root.appendChild(document.createElement('content'));