ash uber tray: Add entry for power and date.

ash/system/tray/system_tray.cc

Index: ash/system/tray/system_tray.cc
diff --git a/ash/system/tray/system_tray.cc b/ash/system/tray/system_tray.cc
index cbb9128dd65832f7b50554e8c64f1acb2a35f4b9..2aa5b2c04730b8e7d2152f110b77e9e8fc293d5c 100644
--- a/ash/system/tray/system_tray.cc
+++ b/ash/system/tray/system_tray.cc
@@ -30,7 +30,7 @@ class SystemTrayBubble : public views::BubbleDelegateView {
         tray_(tray),
         items_(items),
         detailed_(detailed) {
-    set_margin(1);
+    set_margin(0);
   }
 
   virtual ~SystemTrayBubble() {
@@ -77,7 +77,9 @@ SystemTray::SystemTray()
     : items_(),
       popup_(NULL) {
   SetLayoutManager(new views::BoxLayout(views::BoxLayout::kHorizontal,
-        5, 10, 3));
+        5, 0, 3));
+  set_background(views::Background::CreateSolidBackground(
+        SkColorSetARGB(127, 0, 0, 0)));
 }
 
 SystemTray::~SystemTray() {