Uber tray UI Polish: Adjust uber tray bubble and arrow to align it with the app list bubble.

ash/system/tray/tray_bubble_view.cc

Index: ash/system/tray/tray_bubble_view.cc
diff --git a/ash/system/tray/tray_bubble_view.cc b/ash/system/tray/tray_bubble_view.cc
index 1b934d4c399a20b36015d78173dd7c1a4e0bf1f4..1ac2d5046142a8e98f018d92ddd8e9941f7b8779 100644
--- a/ash/system/tray/tray_bubble_view.cc
+++ b/ash/system/tray/tray_bubble_view.cc
@@ -33,8 +33,8 @@ const int kBottomLineHeight = 1;
 const int kSystemTrayBubbleHorizontalInset = 1;
 const int kSystemTrayBubbleVerticalInset = 1;
 
-const int kArrowHeight = 10;
-const int kArrowWidth = 20;
+const int kArrowHeight = 9;
+const int kArrowWidth = 19;
 
 // Inset the arrow a bit from the edge.
 const int kArrowMinOffset = kArrowWidth / 2 + 4;
@@ -188,6 +188,7 @@ class TrayBubbleBorder : public views::BubbleBorder {
                                                               arrow_reference);
 
     SkPaint paint;
+    paint.setAntiAlias(true);
     paint.setStyle(SkPaint::kFill_Style);
     paint.setColor(background ? background->get_color() : kBackgroundColor);
     canvas->DrawPath(path, paint);