mash: Move tray_constants.h and FixedSizedImageView to //ash/common

ash/system/tray/tray_bar_button_with_title.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_bar_button_with_title.h"
 
 #include <memory>
 
-#include "ash/system/tray/tray_constants.h"
+#include "ash/common/system/tray/tray_constants.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/resources/grit/ui_resources.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/painter.h"
 #include "ui/views/resources/grit/views_resources.h"
 
 namespace ash {
 namespace {
 
@@ skipping 83 matching lines @@
     // a little bit up to look closer to the bar.
     gfx::Size title_size = title_->GetPreferredSize();
     title_->SetBounds(rect.x(),
                       bar_image_y + image_height_ - 3,
                       rect.width(),
                       title_size.height());
   }
 }
 
 }  // namespace ash