Cleanup: Remove unneeded browser_thread.h includes.

chrome/browser/ui/ash/system_tray_delegate_chromeos.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 "chrome/browser/ui/ash/system_tray_delegate_chromeos.h"
 
 #include <algorithm>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 79 matching lines @@
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/session_manager_client.h"
 #include "chromeos/ime/extension_ime_util.h"
 #include "chromeos/ime/input_method_manager.h"
 #include "chromeos/ime/xkeyboard.h"
 #include "chromeos/login/login_state.h"
 #include "components/policy/core/common/cloud/cloud_policy_store.h"
-#include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/browser/web_contents.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_adapter_factory.h"
 #include "device/bluetooth/bluetooth_device.h"
 #include "grit/ash_strings.h"
 #include "grit/generated_resources.h"
 #include "grit/locale_settings.h"
@@ skipping 1186 matching lines @@
 void SystemTrayDelegateChromeOS::UserAddedToSession(
     const std::string& user_id) {
   GetSystemTrayNotifier()->NotifyUserAddedToSession();
 }
 
 ash::SystemTrayDelegate* CreateSystemTrayDelegate() {
   return new SystemTrayDelegateChromeOS();
 }
 
 }  // namespace chromeos