Add origin() method on View and use it to simplify some callers.

ash/common/system/tray/fixed_sized_scroll_view.cc

Index: ash/common/system/tray/fixed_sized_scroll_view.cc
diff --git a/ash/common/system/tray/fixed_sized_scroll_view.cc b/ash/common/system/tray/fixed_sized_scroll_view.cc
index d3c4a35691d6a8063aa56697a7d5f1ed65186a8d..1959fd654cff71c227a83fedb2544e9391153486 100644
--- a/ash/common/system/tray/fixed_sized_scroll_view.cc
+++ b/ash/common/system/tray/fixed_sized_scroll_view.cc
@@ -62,7 +62,7 @@ void FixedSizedScrollView::Layout() {
   // away from the current visible region user is viewing. ScrollView::Layout()
   // will make sure the contents line up with its viewport properly if
   // the contents moves out of the viewport region.
-  bounds.set_origin(contents()->bounds().origin());
+  bounds.set_origin(contents()->origin());
   contents()->SetBoundsRect(bounds);
 
   views::ScrollView::Layout();