Consolidate some more ash tray constants.

ash/common/system/tray/tray_item_view.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/tray/tray_item_view.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "ash/common/shelf/wm_shelf_util.h"
 #include "ash/common/system/tray/system_tray.h"
 #include "ash/common/system/tray/system_tray_item.h"
@@ skipping 76 matching lines @@
 }
 
 gfx::Size TrayItemView::GetPreferredSize() const {
   DCHECK_EQ(1, child_count());
   gfx::Size size;
   if (UseMd()) {
     gfx::Size inner_size = views::View::GetPreferredSize();
     if (image_view_)
       inner_size = gfx::Size(kTrayIconSize, kTrayIconSize);
     gfx::Rect rect(inner_size);
-    rect.Inset(gfx::Insets(-GetTrayConstant(TRAY_IMAGE_ITEM_PADDING)));
+    rect.Inset(gfx::Insets(-kTrayImageItemPadding));
     size = rect.size();
   } else {
     size = views::View::GetPreferredSize();
     if (IsHorizontalAlignment(owner()->system_tray()->shelf_alignment()))
       size.set_height(kTrayIconHeight);
     else
       size.set_width(kTrayIconWidth);
   }
   if (!animation_.get() || !animation_->is_animating())
     return size;
@@ skipping 33 matching lines @@
 void TrayItemView::AnimationEnded(const gfx::Animation* animation) {
   if (animation->GetCurrentValue() < 0.1)
     views::View::SetVisible(false);
 }
 
 void TrayItemView::AnimationCanceled(const gfx::Animation* animation) {
   AnimationEnded(animation);
 }
 
 }  // namespace ash