mash: Remove StatusAreaWidget references from system tray classes

ash/system/web_notification/ash_popup_alignment_delegate_unittest.cc

Index: ash/system/web_notification/ash_popup_alignment_delegate_unittest.cc
diff --git a/ash/system/web_notification/ash_popup_alignment_delegate_unittest.cc b/ash/system/web_notification/ash_popup_alignment_delegate_unittest.cc
index 72356a59c69e757190b6f98259afc3ad8ffb0989..f1c17b4a91d2ec6c5e49fdaebcb4ec56eaaca23a 100644
--- a/ash/system/web_notification/ash_popup_alignment_delegate_unittest.cc
+++ b/ash/system/web_notification/ash_popup_alignment_delegate_unittest.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "ash/system/web_notification/ash_popup_alignment_delegate.h"
+#include "ash/common/system/web_notification/ash_popup_alignment_delegate.h"
 
 #include <utility>
 #include <vector>
@@ -15,7 +15,6 @@
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
 #include "ash/display/display_manager.h"
-#include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "base/command_line.h"
@@ -28,6 +27,7 @@
 
 namespace ash {
 
+// TODO(jamescook): Move this to //ash/common. http://crbug.com/620955
 class AshPopupAlignmentDelegateTest : public test::AshTestBase {
  public:
   AshPopupAlignmentDelegateTest() {}
@@ -270,7 +270,8 @@ TEST_F(AshPopupAlignmentDelegateTest, Extended) {
   SetAlignmentDelegate(
       base::WrapUnique(new AshPopupAlignmentDelegate(GetPrimaryShelf())));
 
-  display::Display second_display = ScreenUtil::GetSecondaryDisplay();
+  display::Display second_display =
+      Shell::GetInstance()->display_manager()->GetDisplayAt(1u);
   WmShelf* second_shelf =
       WmLookup::Get()
           ->GetRootWindowControllerWithDisplayId(second_display.id())