views: Make View::set_border() take a scoped_ptr<>.

ash/system/web_notification/web_notification_tray.cc

 // Copyright (c) 2012 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/system/web_notification/web_notification_tray.h"
 
 #include "ash/ash_switches.h"
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_layout_manager_observer.h"
@@ skipping 293 matching lines @@
     : TrayBackgroundView(status_area_widget),
       button_(NULL),
       show_message_center_on_unlock_(false),
       should_update_tray_content_(false),
       should_block_shelf_auto_hide_(false) {
   button_ = new internal::WebNotificationButton(this);
   button_->set_triggerable_event_flags(
       ui::EF_LEFT_MOUSE_BUTTON | ui::EF_RIGHT_MOUSE_BUTTON);
   tray_container()->AddChildView(button_);
   SetContentsBackground();
-  tray_container()->set_border(NULL);
+  tray_container()->ClearBorder();
   SetVisible(false);
   message_center_tray_.reset(new message_center::MessageCenterTray(
       this,
       message_center::MessageCenter::Get()));
   work_area_observer_.reset(new internal::WorkAreaObserver());
   OnMessageCenterTrayChanged();
 }
 
 WebNotificationTray::~WebNotificationTray() {
   // Release any child views that might have back pointers before ~View().
@@ skipping 126 matching lines @@
 
 void WebNotificationTray::UpdateAfterLoginStatusChange(
     user::LoginStatus login_status) {
   OnMessageCenterTrayChanged();
 }
 
 void WebNotificationTray::SetShelfAlignment(ShelfAlignment alignment) {
   if (alignment == shelf_alignment())
     return;
   internal::TrayBackgroundView::SetShelfAlignment(alignment);
-  tray_container()->set_border(NULL);
+  tray_container()->ClearBorder();
   // Destroy any existing bubble so that it will be rebuilt correctly.
   message_center_tray_->HideMessageCenterBubble();
   message_center_tray_->HidePopupBubble();
 }
 
 void WebNotificationTray::AnchorUpdated() {
   if (message_center_bubble()) {
     message_center_bubble()->bubble_view()->UpdateBubble();
     UpdateBubbleViewArrow(message_center_bubble()->bubble_view());
   }
@@ skipping 149 matching lines @@
 
 message_center::MessageCenterBubble*
 WebNotificationTray::GetMessageCenterBubbleForTest() {
   if (!message_center_bubble())
     return NULL;
   return static_cast<message_center::MessageCenterBubble*>(
       message_center_bubble()->bubble());
 }
 
 }  // namespace ash