Add TraySms for SMS messages.

ash/system/tray/tray_details_view.cc

Index: ash/system/tray/tray_details_view.cc
diff --git a/ash/system/tray/tray_details_view.cc b/ash/system/tray/tray_details_view.cc
index 2d1d1cd0fd6542c2fb035884d4368a6cab43ae97..2b6e74a9b74bb7d4ecbe4b6c0d0734f6f641664f 100644
--- a/ash/system/tray/tray_details_view.cc
+++ b/ash/system/tray/tray_details_view.cc
@@ -59,23 +59,19 @@ void TrayDetailsView::Layout() {
 
   scroller_->set_fixed_size(gfx::Size());
   gfx::Size size = GetPreferredSize();
-  if (size.height() < height()) {
-    // The available size is larger than the requested size. In this case, do
-    // the normal layout, then make sure the footer element is bottom aligned.
-    views::View::Layout();
-    gfx::Rect fbounds = footer_->bounds();
-    fbounds.set_y(height() - footer_->height());
-    footer_->SetBoundsRect(fbounds);
-  } else {
+  if (size.height() > height()) {
     // The available size is smaller than the requested size. Squeeze the
-    // scroller so that everything fits in the available size, and then do the
-    // normal layout.
+    // scroller so that everything fits in the available size.
     gfx::Size scroller_size = scroll_content_->GetPreferredSize();
     scroller_->set_fixed_size(gfx::Size(
         width() + scroller_->GetScrollBarWidth(),
         scroller_size.height() - (size.height() - height())));
-    views::View::Layout();
   }
+  views::View::Layout();
+  // Always make sure the footer element is bottom aligned.
+  gfx::Rect fbounds = footer_->bounds();
+  fbounds.set_y(height() - footer_->height());
+  footer_->SetBoundsRect(fbounds);
 }
 
 }  // namespace internal