Update the layout of opt-in IME menu.

ash/common/system/tray/tray_constants.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_constants.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 #include "base/logging.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/color_palette.h"
@@ skipping 20 matching lines @@
 // Size of tray items on the primary axis.
 const int kTrayItemSize = 32;
 
 const int kTrayLabelItemHorizontalPaddingBottomAlignment = 7;
 
 // Vertical padding between status tray items when the shelf is vertical.
 const int kTrayLabelItemVerticalPaddingVerticalAlignment = 4;
 
 const int kTrayMenuBottomRowPadding = 5;
 const int kTrayMenuBottomRowPaddingBetweenItems = -1;
+const int kTrayMenuMinimumWidth = 300;
+const int kTrayMenuMinimumWidthMd = 352;
 
 const int kTrayPopupAutoCloseDelayInSeconds = 2;
 const int kTrayPopupAutoCloseDelayForTextInSeconds = 5;
 const int kTrayPopupPaddingHorizontal = 18;
 const int kTrayPopupPaddingBetweenItems = 10;
 const int kTrayPopupButtonEndMargin = 10;
 const int kTrayPopupUserCardVerticalPadding = 10;
 const int kTrayPopupLabelHorizontalPadding = 4;
 const int kTrayPopupSliderPaddingMD = 16;
 const int kTrayPopupLabelRightPadding = 8;
@@ skipping 112 matching lines @@
     case TRAY_IME_MENU_ICON:
       return kTrayImeMenuIcon[mode];
     case TRAY_IMAGE_ITEM_PADDING:
       return kTrayImageItemPadding[mode];
   }
   NOTREACHED();
   return 0;
 }
 
 }  // namespace ash