ash: Do not focus the buttons in the uber-tray on click.

ash/system/tray/tray_views.cc

Index: ash/system/tray/tray_views.cc
diff --git a/ash/system/tray/tray_views.cc b/ash/system/tray/tray_views.cc
index a0edbe2e62d82de77165c7582c67a252b1561416..7756960e6c9e5ae51885be47afbc6a32d6a2e6dc 100644
--- a/ash/system/tray/tray_views.cc
+++ b/ash/system/tray/tray_views.cc
@@ -314,6 +314,7 @@ TrayPopupTextButton::TrayPopupTextButton(views::ButtonListener* listener,
   set_alignment(ALIGN_CENTER);
   set_border(NULL);
   set_focusable(true);
+  set_request_focus_on_press(false);
 }
 
 TrayPopupTextButton::~TrayPopupTextButton() {}
@@ -400,6 +401,7 @@ TrayPopupHeaderButton::TrayPopupHeaderButton(views::ButtonListener* listener,
   SetImageAlignment(views::ImageButton::ALIGN_CENTER,
                     views::ImageButton::ALIGN_MIDDLE);
   set_focusable(true);
+  set_request_focus_on_press(false);
 }
 
 TrayPopupHeaderButton::~TrayPopupHeaderButton() {}