Change the new-task-manager flag so that the new implementation is enabled by default for all users.

chrome/browser/apps/guest_view/web_view_browsertest.cc

 // Copyright 2013 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 <queue>
 
 #include "base/location.h"
 #include "base/path_service.h"
 #include "base/process/process.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 1356 matching lines @@
   PrerenderLinkManager* prerender_link_manager =
       PrerenderLinkManagerFactory::GetForProfile(
           Profile::FromBrowserContext(guest_web_contents->GetBrowserContext()));
   ASSERT_TRUE(prerender_link_manager != NULL);
   EXPECT_TRUE(prerender_link_manager->IsEmpty());
 }
 
 // Verify that existing <webview>'s are detected when the task manager starts
 // up.
 IN_PROC_BROWSER_TEST_F(WebViewTest, TaskManagerExistingWebView) {
+  // This test is for the old implementation of the task manager. We must
+  // explicitly disable the new one.
+  task_manager::browsertest_util::EnableOldTaskManager();
+
   ASSERT_TRUE(StartEmbeddedTestServer());
 
   LoadGuest("/extensions/platform_apps/web_view/task_manager/guest.html",
             "web_view/task_manager");
 
   chrome::ShowTaskManager(browser());  // Show task manager AFTER guest loads.
 
   const char* guest_title = "WebViewed test content";
   const char* app_name = "<webview> task manager test";
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchWebView(guest_title)));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAboutBlankTab()));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchApp(app_name)));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchBackground(app_name)));
 
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyWebView()));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyTab()));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyApp()));
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchAnyBackground()));
 }
 
 // Verify that the task manager notices the creation of new <webview>'s.
 IN_PROC_BROWSER_TEST_F(WebViewTest, TaskManagerNewWebView) {
+  // This test is for the old implementation of the task manager. We must
+  // explicitly disable the new one.
+  task_manager::browsertest_util::EnableOldTaskManager();
+
   ASSERT_TRUE(StartEmbeddedTestServer());
 
   chrome::ShowTaskManager(browser());  // Show task manager BEFORE guest loads.
 
   LoadGuest("/extensions/platform_apps/web_view/task_manager/guest.html",
             "web_view/task_manager");
 
   const char* guest_title = "WebViewed test content";
   const char* app_name = "<webview> task manager test";
   ASSERT_NO_FATAL_FAILURE(WaitForTaskManagerRows(1, MatchWebView(guest_title)));
@@ skipping 1317 matching lines @@
   const task_management::Task* task = task_manager.tasks().back();
   EXPECT_EQ(task_management::Task::GUEST, task->GetType());
   const base::string16 title = task->title();
   const base::string16 expected_prefix = GetExpectedPrefix(guest_contents);
   EXPECT_TRUE(base::StartsWith(title,
                                expected_prefix,
                                base::CompareCase::INSENSITIVE_ASCII));
 }
 
 #endif  // defined(ENABLE_TASK_MANAGER)