Give Ash material design tray items the correct size and layout

ash/system/user/user_card_view.cc

 // Copyright 2014 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/user/user_card_view.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "ash/common/login_status.h"
@@ skipping 415 matching lines @@
 #else
       AddChildView(user_email);
 #endif
     }
   }
 }
 
 views::View* UserCardView::CreateIcon(LoginStatus login_status,
                                       int user_index) {
   RoundedImageView* icon =
-      new RoundedImageView(kTrayAvatarCornerRadius, user_index == 0);
+      new RoundedImageView(kTrayRoundedBorderRadius, user_index == 0);
   if (login_status == LoginStatus::GUEST) {
     icon->SetImage(*ui::ResourceBundle::GetSharedInstance()
                         .GetImageNamed(IDR_AURA_UBER_TRAY_GUEST_ICON)
                         .ToImageSkia(),
-                   gfx::Size(kTrayAvatarSize, kTrayAvatarSize));
+                   gfx::Size(kTrayItemSize, kTrayItemSize));
   } else {
     SessionStateDelegate* delegate = WmShell::Get()->GetSessionStateDelegate();
     icon->SetImage(delegate->GetUserInfo(user_index)->GetImage(),
-                   gfx::Size(kTrayAvatarSize, kTrayAvatarSize));
+                   gfx::Size(kTrayItemSize, kTrayItemSize));
   }
   return icon;
 }
 
 }  // namespace tray
 }  // namespace ash