Give up focus if the focused view becomes unfocusable

ui/views/examples/widget_example.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 "ui/views/examples/widget_example.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/layout/box_layout.h"
@@ skipping 59 matching lines @@
 #if defined(OS_LINUX)
   // Windows does not support TYPE_CONTROL top-level widgets.
   BuildButton(container, "Child widget", CHILD);
 #endif
 }
 
 void WidgetExample::BuildButton(View* container,
                                 const std::string& label,
                                 int tag) {
   LabelButton* button = new LabelButton(this, ASCIIToUTF16(label));
-  button->set_focusable(true);
+  button->SetFocusable(true);
   button->set_tag(tag);
   container->AddChildView(button);
 }
 
 void WidgetExample::ShowWidget(View* sender, Widget::InitParams params) {
   // Setup shared Widget heirarchy and bounds parameters.
   params.parent = sender->GetWidget()->GetNativeView();
   params.bounds = gfx::Rect(sender->GetBoundsInScreen().CenterPoint(),
                             gfx::Size(300, 200));
 
@@ skipping 26 matching lines @@
       ShowWidget(sender, Widget::InitParams(Widget::InitParams::TYPE_CONTROL));
       break;
     case CLOSE_WIDGET:
       sender->GetWidget()->Close();
       break;
   }
 }
 
 }  // namespace examples
 }  // namespace views