Observes work area change and auto-hide for notifications.

ui/message_center/views/message_popup_collection_unittest.cc

Index: ui/message_center/views/message_popup_collection_unittest.cc
diff --git a/ui/message_center/views/message_popup_collection_unittest.cc b/ui/message_center/views/message_popup_collection_unittest.cc
index bc0699617c22443544c16a2987b13671e25eb191..eba01eb940371cb3f49f7a34d551329513a74884 100644
--- a/ui/message_center/views/message_popup_collection_unittest.cc
+++ b/ui/message_center/views/message_popup_collection_unittest.cc
@@ -29,7 +29,7 @@ class MessagePopupCollectionTest : public views::ViewsTestBase {
     // This size fits test machines resolution and also can keep a few toasts
     // w/o ill effects of hitting the screen overflow. This allows us to assume
     // and verify normal layout of the toast stack.
-    collection_->SetWorkAreaForTest(gfx::Rect(0, 0, 600, 400));
+    collection_->SetWorkArea(gfx::Rect(0, 0, 600, 400));
     id_ = 0;
   }