ash: Some code-cleanup around tray-resizing code.

ash/system/date/date_view.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/date/date_view.h"
 
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/system/tray/tray_constants.h"
 #include "base/time.h"
@@ skipping 75 matching lines @@
   // called just a teeny bit early, then it will skip the next minute.
   seconds_left += kTimerSlopSeconds;
 
   timer_.Stop();
   timer_.Start(
       FROM_HERE, base::TimeDelta::FromSeconds(seconds_left),
       this, &BaseDateTimeView::UpdateText);
 }
 
 void BaseDateTimeView::ChildPreferredSizeChanged(views::View* child) {
-  views::View::PreferredSizeChanged();
-  if (GetWidget())
-    GetWidget()->SetSize(GetWidget()->GetContentsView()->GetPreferredSize());
+  PreferredSizeChanged();
 }
 
 void BaseDateTimeView::OnLocaleChanged() {
   UpdateText();
 }
 
 DateView::DateView() : actionable_(false) {
   SetLayoutManager(
       new views::BoxLayout(
           views::BoxLayout::kVertical, 0, 0, kTrayPopupTextSpacingVertical));
@@ skipping 72 matching lines @@
 }
 
 bool TimeView::PerformAction(const views::Event& event) {
   return false;
 }
 
 
 }  // namespace tray
 }  // namespace internal
 }  // namespace ash