mash: Move SystemTrayImage and TrayImageItem to //ash/common

ash/system/tray/tray_details_view_unittest.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 "ash/system/tray/tray_details_view.h"
 
+#include "ash/common/system/tray/system_tray_item.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/system/tray/hover_highlight_view.h"
 #include "ash/system/tray/special_popup_row.h"
 #include "ash/system/tray/system_tray.h"
-#include "ash/system/tray/system_tray_item.h"
 #include "ash/system/tray/tray_popup_header_button.h"
 #include "ash/system/tray/view_click_listener.h"
 #include "ash/test/ash_test_base.h"
 #include "base/run_loop.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
 #include "ui/aura/window.h"
 #include "ui/events/test/event_generator.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/view.h"
@@ skipping 249 matching lines @@
   gfx::Rect bounds = button->GetBoundsInScreen();
   gfx::Point initial_point(bounds.x() - 1, bounds.y());
   generator.set_current_location(initial_point);
   generator.MoveMouseBy(1, 0);
   RunAllPendingInMessageLoop();
   EXPECT_TRUE(button->background());
 }
 
 }  // namespace test
 }  // namespace ash