Modify AX AriaGrabbed test and enable it.

content/browser/accessibility/dump_accessibility_tree_browsertest.cc

 // 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.
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/path_service.h"
@@ skipping 246 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest,
                        MAYBE(AccessibilityAriaFlowto)) {
   RunAriaTest(FILE_PATH_LITERAL("aria-flowto.html"));
 }
 
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityAriaForm) {
   RunAriaTest(FILE_PATH_LITERAL("aria-form.html"));
 }
 
-IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest,
-                       DISABLED_AccessibilityAriaGrabbed) {
+IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityAriaGrabbed) {
   RunAriaTest(FILE_PATH_LITERAL("aria-grabbed.html"));
 }
 
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityAriaGrid) {
   RunAriaTest(FILE_PATH_LITERAL("aria-grid.html"));
 }
 
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityAriaGridCell) {
   RunAriaTest(FILE_PATH_LITERAL("aria-gridcell.html"));
 }
@@ skipping 869 matching lines @@
 // crbug.com/281952
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, DISABLED_AccessibilityVideo) {
   RunHtmlTest(FILE_PATH_LITERAL("video.html"));
 }
 
 IN_PROC_BROWSER_TEST_F(DumpAccessibilityTreeTest, AccessibilityWbr) {
   RunHtmlTest(FILE_PATH_LITERAL("wbr.html"));
 }
 
 }  // namespace content