Fix flaky linux panel tests related to active state checks

chrome/browser/ui/panels/old_panel_and_desktop_notification_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 "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/notifications/balloon.h"
 #include "chrome/browser/notifications/balloon_collection_impl.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
 #include "chrome/browser/notifications/notification.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/panels/old_base_panel_browser_test.h"
 #include "chrome/browser/ui/panels/panel.h"
 #include "chrome/browser/ui/panels/panel_manager.h"
 #include "chrome/browser/ui/panels/test_panel_mouse_watcher.h"
 #include "chrome/common/pref_names.h"
 #include "content/public/common/show_desktop_notification_params.h"
 #include "ui/gfx/screen.h"
 
-// Panel tests are flaking on linux CQ. http://crbug.com/135377
-#if !defined(OS_LINUX)
-
 // Desktop notification code subscribes to various panel change notifications
 // so that it knows when to adjusts balloon positions. In order to give
 // desktop notification code a chance to process the change notifications,
 // we call MessageLoopForUI::current()->RunAllPending() after any panel change
 // has been made.
 class OldPanelAndDesktopNotificationTest : public OldBasePanelBrowserTest {
  public:
   OldPanelAndDesktopNotificationTest() : OldBasePanelBrowserTest() {
   }
 
@@ skipping 383 matching lines @@
   MessageLoopForUI::current()->RunAllPending();
   EXPECT_EQ(balloon_bottom_after_short_panel_created,
             GetBalloonBottomPosition(balloon));
 
   // Close short panel. Expect that the notification balloo moves back to its
   // original position.
   short_panel->Close();
   MessageLoopForUI::current()->RunAllPending();
   EXPECT_EQ(original_balloon_bottom, GetBalloonBottomPosition(balloon));
 }
-
-#endif  // !OS_LINUX