ash: Update app list UI to match latest crwm.

ash/app_list/app_list_item_view.h

Index: ash/app_list/app_list_item_view.h
diff --git a/ash/app_list/app_list_item_view.h b/ash/app_list/app_list_item_view.h
index 3f2123d6d297fb64d3b7f8c48ab019553dbbea16..cdc315ad4b04092e1231529949fb13f993d0f320 100644
--- a/ash/app_list/app_list_item_view.h
+++ b/ash/app_list/app_list_item_view.h
@@ -33,6 +33,8 @@ class AppListItemView : public views::CustomButton,
                   views::ButtonListener* listener);
   virtual ~AppListItemView();
 
+  static gfx::Size GetPreferredSizeForIconSize(const gfx::Size& icon_size);
+
   void SetSelected(bool selected);
   bool selected() const {
     return selected_;
@@ -46,9 +48,6 @@ class AppListItemView : public views::CustomButton,
     icon_size_ = size;
   }
 
-  // Icon padding
-  static const int kPadding = 5;
-
   // Internal class name.
   static const char kViewClassName[];