Give up focus if the focused view becomes unfocusable

ash/system/tray/tray_details_view_unittest.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/system/tray/tray_details_view.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/system/status_area_widget.h"
@@ skipping 45 matching lines @@
  public:
   TestItem() : SystemTrayItem(GetSystemTray()), tray_view_(NULL) {}
 
   // Overridden from SystemTrayItem:
   virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE {
     tray_view_ = new views::View;
     return tray_view_;
   }
   virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE {
     default_view_ = new views::View;
-    default_view_->set_focusable(true);
+    default_view_->SetFocusable(true);
     return default_view_;
   }
   virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE {
     detailed_view_ = new TestDetailsView(this);
     return detailed_view_;
   }
   virtual void DestroyTrayView() OVERRIDE {
     tray_view_ = NULL;
   }
   virtual void DestroyDefaultView() OVERRIDE {
@@ skipping 63 matching lines @@
   test_item_2->detailed_view()->TransitionToDefaultView();
   RunAllPendingInMessageLoop();
 
   EXPECT_TRUE(test_item_2->default_view());
   EXPECT_FALSE(test_item_2->detailed_view());
   EXPECT_FALSE(test_item_2->default_view()->HasFocus());
 }
 
 }  // namespace test
 }  // namespace ash