Fix status area tray spacing.

ash/system/tray/system_tray_unittest.cc

Index: ash/system/tray/system_tray_unittest.cc
diff --git a/ash/system/tray/system_tray_unittest.cc b/ash/system/tray/system_tray_unittest.cc
index 6577a784b452faea7a5476d65b378f7cd05e8761..b03c548a14ff0f405661e05fafa812349dd31fc6 100644
--- a/ash/system/tray/system_tray_unittest.cc
+++ b/ash/system/tray/system_tray_unittest.cc
@@ -138,23 +138,27 @@ TEST_F(SystemTrayTest, TrayWidgetAutoResizes) {
   SystemTray* tray = GetSystemTray();
   ASSERT_TRUE(tray->GetWidget());
 
-  gfx::Size widget_size = tray->GetWidget()->GetWindowBoundsInScreen().size();
+  // Add an initial tray item so that the tray gets laid out correctly.
+  TestItem* initial_item = new TestItem;
+  tray->AddTrayItem(initial_item);
 
-  TestItem* test_item = new TestItem;
-  tray->AddTrayItem(test_item);
+  gfx::Size initial_size = tray->GetWidget()->GetWindowBoundsInScreen().size();
+
+  TestItem* new_item = new TestItem;
+  tray->AddTrayItem(new_item);
 
   gfx::Size new_size = tray->GetWidget()->GetWindowBoundsInScreen().size();
 
   // Adding the new item should change the size of the tray.
-  EXPECT_NE(widget_size.ToString(), new_size.ToString());
+  EXPECT_NE(initial_size.ToString(), new_size.ToString());
 
   // Hiding the tray view of the new item should also change the size of the
   // tray.
-  test_item->tray_view()->SetVisible(false);
-  EXPECT_EQ(widget_size.ToString(),
+  new_item->tray_view()->SetVisible(false);
+  EXPECT_EQ(initial_size.ToString(),
             tray->GetWidget()->GetWindowBoundsInScreen().size().ToString());
 
-  test_item->tray_view()->SetVisible(true);
+  new_item->tray_view()->SetVisible(true);
   EXPECT_EQ(new_size.ToString(),
             tray->GetWidget()->GetWindowBoundsInScreen().size().ToString());
 }