Revert of Disable flaky TaskManagerBrowserTest.DevToolsNew{Und,D}ockedWindow tests

chrome/browser/task_manager/task_manager_browsertest.cc

 // Copyright 2016 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 <stddef.h>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/path_service.h"
@@ skipping 681 matching lines @@
       MatchUtility(proxy_resolver_name), ColumnSpecifier::V8_MEMORY,
       minimal_heap_size));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerStatToExceed(
       MatchUtility(proxy_resolver_name), ColumnSpecifier::V8_MEMORY_USED,
       minimal_heap_size));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyUtility()));
   ASSERT_NO_FATAL_FAILURE(
       WaitForTaskManagerRows(1, MatchUtility(proxy_resolver_name)));
 }
 
-// TODO(crbug.com/642482): Disabled flaky test.
-IN_PROC_BROWSER_TEST_F(TaskManagerBrowserTest,
-                       DISABLED_DevToolsNewDockedWindow) {
+IN_PROC_BROWSER_TEST_F(TaskManagerBrowserTest, DevToolsNewDockedWindow) {
   ShowTaskManager();  // Task manager shown BEFORE dev tools window.
 
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyTab()));
   DevToolsWindow* devtools =
       DevToolsWindowTesting::OpenDevToolsWindowSync(browser(), true);
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(2, MatchAnyTab()));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(2, MatchAnyTab()));
   DevToolsWindowTesting::CloseDevToolsWindowSync(devtools);
 }
 
-// TODO(crbug.com/642482): Disabled flaky test.
-IN_PROC_BROWSER_TEST_F(TaskManagerBrowserTest,
-                       DISABLED_DevToolsNewUndockedWindow) {
+IN_PROC_BROWSER_TEST_F(TaskManagerBrowserTest, DevToolsNewUndockedWindow) {
   ShowTaskManager();  // Task manager shown BEFORE dev tools window.
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyTab()));
   DevToolsWindow* devtools =
       DevToolsWindowTesting::OpenDevToolsWindowSync(browser(), false);
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(3, MatchAnyTab()));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(3, MatchAnyTab()));
   DevToolsWindowTesting::CloseDevToolsWindowSync(devtools);
 }
 
 IN_PROC_BROWSER_TEST_F(TaskManagerBrowserTest, DevToolsOldDockedWindow) {
@@ skipping 350 matching lines @@
 
     // Because the subframes for tab 2 are nested, their order is deterministic.
     EXPECT_EQ("Subframe: http://a.com/",
               base::UTF16ToUTF8(model()->GetRowTitle(tab2_start + 1)));
     EXPECT_EQ("Subframe: http://c.com/",
               base::UTF16ToUTF8(model()->GetRowTitle(tab2_start + 2)));
     EXPECT_EQ("Subframe: http://b.com/",
               base::UTF16ToUTF8(model()->GetRowTitle(tab2_start + 3)));
   }
 }