Give up focus if the focused view becomes unfocusable

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 "ash/system/tray/tray_utils.h"
@@ skipping 119 matching lines @@
     : hour_type_(ash::Shell::GetInstance()->system_tray_delegate()->
                  GetHourClockType()),
       actionable_(false) {
   SetLayoutManager(
       new views::BoxLayout(
           views::BoxLayout::kVertical, 0, 0, 0));
   date_label_ = CreateLabel();
   date_label_->SetEnabledColor(kHeaderTextColorNormal);
   UpdateTextInternal(base::Time::Now());
   AddChildView(date_label_);
-  set_focusable(actionable_);
+  SetFocusable(actionable_);
 }
 
 DateView::~DateView() {
 }
 
 void DateView::SetActionable(bool actionable) {
   actionable_ = actionable;
-  set_focusable(actionable_);
+  SetFocusable(actionable_);
 }
 
 void DateView::UpdateTimeFormat() {
   hour_type_ =
       ash::Shell::GetInstance()->system_tray_delegate()->GetHourClockType();
   UpdateText();
 }
 
 void DateView::UpdateTextInternal(const base::Time& now) {
   SetAccessibleName(
@@ skipping 29 matching lines @@
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 TimeView::TimeView(TrayDate::ClockLayout clock_layout)
     : hour_type_(ash::Shell::GetInstance()->system_tray_delegate()->
                  GetHourClockType()) {
   SetupLabels();
   UpdateTextInternal(base::Time::Now());
   UpdateClockLayout(clock_layout);
-  set_focusable(false);
+  SetFocusable(false);
 }
 
 TimeView::~TimeView() {
 }
 
 void TimeView::UpdateTimeFormat() {
   hour_type_ =
       ash::Shell::GetInstance()->system_tray_delegate()->GetHourClockType();
   UpdateText();
 }
@@ skipping 90 matching lines @@
 void TimeView::SetupLabel(views::Label* label) {
   label->set_owned_by_client();
   SetupLabelForTray(label);
   gfx::Font font = label->font();
   label->SetFont(font.DeriveFont(0, font.GetStyle() & ~gfx::Font::BOLD));
 }
 
 }  // namespace tray
 }  // namespace internal
 }  // namespace ash