Fix //third_party/cec to not disable -Wunused-function.

ash/system/web_notification/web_notification_tray_unittest.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 "ash/common/system/web_notification/web_notification_tray.h"
 
 #include <utility>
 #include <vector>
 
 #include "ash/common/material_design/material_design_controller.h"
@@ skipping 36 matching lines @@
 
 namespace ash {
 
 namespace {
 
 WebNotificationTray* GetTray() {
   return StatusAreaWidgetTestHelper::GetStatusAreaWidget()
       ->web_notification_tray();
 }
 
+#if defined(OS_CHROMEOS)
+
 WebNotificationTray* GetSecondaryTray() {
   StatusAreaWidget* status_area_widget =
       StatusAreaWidgetTestHelper::GetSecondaryStatusAreaWidget();
   if (status_area_widget)
     return status_area_widget->web_notification_tray();
   return NULL;
 }
 
+#endif
+
 message_center::MessageCenter* GetMessageCenter() {
   return GetTray()->message_center();
 }
 
 SystemTray* GetSystemTray() {
   return StatusAreaWidgetTestHelper::GetStatusAreaWidget()->system_tray();
 }
 
 // Trivial item implementation for testing PopupAndSystemTray test case.
 class TestItem : public SystemTrayItem {
@@ skipping 448 matching lines @@
   EXPECT_FALSE(tray->is_active());
 
   generator.ReleaseTouch();
   EXPECT_FALSE(tray->is_active());
   EXPECT_FALSE(tray->IsMessageCenterBubbleVisible());
 }
 
 #endif  // OS_CHROMEOS
 
 }  // namespace ash