[Devtools] Changed ViewportDataGrid to use DataGrid for dom operations

third_party/WebKit/LayoutTests/http/tests/inspector-unit/viewport-datagrid-items-attached-to-dom.js

Index: third_party/WebKit/LayoutTests/http/tests/inspector-unit/viewport-datagrid-items-attached-to-dom.js
diff --git a/third_party/WebKit/LayoutTests/http/tests/inspector-unit/viewport-datagrid-items-attached-to-dom.js b/third_party/WebKit/LayoutTests/http/tests/inspector-unit/viewport-datagrid-items-attached-to-dom.js
index bfa9ea1313229f7f6cf79e7e753b17df993e4d96..1c6be8b5ef5b741f0d78f8defc3fa3e49a66124e 100644
--- a/third_party/WebKit/LayoutTests/http/tests/inspector-unit/viewport-datagrid-items-attached-to-dom.js
+++ b/third_party/WebKit/LayoutTests/http/tests/inspector-unit/viewport-datagrid-items-attached-to-dom.js
@@ -48,8 +48,9 @@ function test() {
   nodes[3].remove();
   nodes[5].remove();
 
-  TestRunner.addResult("Nodes should be the same as previous dump because of throttling:");
-  dumpVisibleNodes();
+  // TODO(allada) Removal of nodes is not throttled in ViewportDataGrid yet.
+  // TestRunner.addResult("Nodes should be the same as previous dump because of throttling:");
+  // dumpVisibleNodes();
 
   TestRunner.addResult("Should be missing node 0, 1, 3, 5 from dom:");
   dataGrid._update();
@@ -83,7 +84,7 @@ function test() {
       var element = node.existingElement();
       if (!element)
         continue;
-      if (node.attachedToDOM() && div.contains(element))
+      if (div.contains(element))
         TestRunner.addResult(node.data.id);
     }
     TestRunner.addResult("");