Try to fix layout of scroll views in TrayDetailsViews.

ash/common/system/tray/tray_details_view.h

Index: ash/common/system/tray/tray_details_view.h
diff --git a/ash/common/system/tray/tray_details_view.h b/ash/common/system/tray/tray_details_view.h
index 98b2614dfb16b8dd5e7ec4eeb7605044cff4e07d..b1560053dbb2d37b6a9af2841395246bb8c3bb89 100644
--- a/ash/common/system/tray/tray_details_view.h
+++ b/ash/common/system/tray/tray_details_view.h
@@ -13,6 +13,7 @@
 #include "ui/views/view.h"
 
 namespace views {
+class BoxLayout;
 class ScrollView;
 class ProgressBar;
 }  // namespace views
@@ -49,6 +50,7 @@ class ASH_EXPORT TrayDetailsView : public views::View,
  protected:
   // views::View:
   void Layout() override;
+  int GetHeightForWidth(int width) const override;
   void OnPaintBorder(gfx::Canvas* canvas) override;
 
   // Creates the row containing the back button and title. For material design
@@ -90,6 +92,7 @@ class ASH_EXPORT TrayDetailsView : public views::View,
   void TransitionToDefaultView();
 
   SystemTrayItem* owner_;
+  views::BoxLayout* box_layout_;
   SpecialPopupRow* title_row_;
   FixedSizedScrollView* scroller_;
   views::View* scroll_content_;