Adjust positioning of cros tray bubbles.

ash/common/system/tray/tray_background_view.h

Index: ash/common/system/tray/tray_background_view.h
diff --git a/ash/common/system/tray/tray_background_view.h b/ash/common/system/tray/tray_background_view.h
index 5b6a5a20136835a504f66834bf2b46095fd15b56..4a72dda62f34765ed11392e2b5292618367841dd 100644
--- a/ash/common/system/tray/tray_background_view.h
+++ b/ash/common/system/tray/tray_background_view.h
@@ -111,12 +111,6 @@ class ASH_EXPORT TrayBackgroundView : public ActionableView,
   // is in the active state.
   void SetContentsBackground(bool draws_active);
 
-  // Returns the anchor rect for the bubble.
-  gfx::Rect GetBubbleAnchorRect(
-      views::Widget* anchor_widget,
-      views::TrayBubbleView::AnchorType anchor_type,
-      views::TrayBubbleView::AnchorAlignment anchor_alignment) const;
-
   // Returns the bubble anchor alignment based on |shelf_alignment_|.
   views::TrayBubbleView::AnchorAlignment GetAnchorAlignment() const;
 
@@ -137,6 +131,13 @@ class ASH_EXPORT TrayBackgroundView : public ActionableView,
   // Updates the visibility of this tray's separator.
   void SetSeparatorVisibility(bool is_show);
 
+  // Gets the anchor for bubbles, which is tray_container().
+  views::View* GetBubbleAnchor() const;
+
+  // Gets additional insets for positioning bubbles relative to
+  // tray_container().
+  gfx::Insets GetBubbleAnchorInsets() const;
+
  protected:
   // ActionableView:
   std::unique_ptr<views::InkDropMask> CreateInkDropMask() const override;