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

ash/common/system/tray/fixed_sized_scroll_view.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/system/tray/fixed_sized_scroll_view.h"
 
 #include "ash/common/material_design/material_design_controller.h"
 
 namespace ash {
 
@@ skipping 44 matching lines @@
 void FixedSizedScrollView::Layout() {
   if (UseMd())
     return views::ScrollView::Layout();
 
   gfx::Rect bounds = gfx::Rect(contents()->GetPreferredSize());
   bounds.set_width(std::max(0, width() - GetScrollBarLayoutWidth()));
   // Keep the origin of the contents unchanged so that the list will not scroll
   // 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();
   if (!vertical_scroll_bar()->visible()) {
     gfx::Rect bounds = contents()->bounds();
     bounds.set_width(bounds.width() + GetScrollBarLayoutWidth());
     contents()->SetBoundsRect(bounds);
   }
 }
 
 void FixedSizedScrollView::OnBoundsChanged(const gfx::Rect& previous_bounds) {
   if (UseMd())
     return;
 
   gfx::Rect bounds = gfx::Rect(contents()->GetPreferredSize());
   bounds.set_width(std::max(0, width() - GetScrollBarLayoutWidth()));
   contents()->SetBoundsRect(bounds);
 }
 
 }  // namespace ash