DevTools: Attempt to make inspector/elements/edit-dom-actions-shadow.html non-flaky

R=vsevik
BUG=355459
NOTRY=true

Review URL: https://codereview.chromium.org/199633018

git-svn-id: svn://svn.chromium.org/blink/trunk@170649 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/inspector/elements/edit-dom-actions-shadow.html

@@ -8,19 +8,13 @@
 function test()
 {
     // Save time on style updates.
-    WebInspector.inspectorView.showPanel("elements");
     WebInspector.StylesSidebarPane.prototype.update = function() {};
     WebInspector.MetricsSidebarPane.prototype.update = function() {};
 
     InspectorTest.runTestSuite([
         function testSetUp(next)
         {
-            InspectorTest.nodeWithId("authorShadowDOMElement");
-            InspectorTest.nodeWithId("testSetAuthorShadowDOMElementAttribute", checkTree);
-            function checkTree()
-            {
-                InspectorTest.expandElementsTree(next);
-            }
+            InspectorTest.expandElementsTree(next);
         },
 
         function testSetAuthorShadowDOMElementAttribute(next)